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أثبت أن المعادلة الآتية تمثل متطابقة :

sinθ(1+ cot 2 θ)= cosθcscθtanθ sinθ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbiqaaWYbqqaaaa aaOpGqSvxza8qaciGGZbGaaiyAaiaac6gacqaH4oqCcaGGOaGaaGym aiabgUcaRiGacogacaGGVbGaaiiDamaaCaaaleqabaGaaGOmaaaaki abeI7aXjaacMcacqGH9aqpdaWcaaqaceaaSCGaci4yaiaac+gacaGG ZbGaeqiUdeNaci4yaiaacohacaGGJbGaeqiUdeNaciiDaiaacggaca GGUbGaeqiUdehabaGaci4CaiaacMgacaGGUbGaeqiUdehaaaaa@592B@    
sinθ(1+ cot 2 θ) MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcqqaaaaaaOpGqSv xza8qabiqaaWYbciGGZbGaaiyAaiaac6gacqaH4oqCcaGGOaGaaGym aiabgUcaRiGacogacaGGVbGaaiiDamaaCaaaleqabaGaaGOmaaaaki abeI7aXjaacMcaaaa@45C4@                      
 
sinθ+sinθ cot 2 θ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbiqaaWYbqqaaaa aaOpGqSvxza8qaciGGZbGaaiyAaiaac6gacqaH4oqCcqGHRaWkciGG ZbGaaiyAaiaac6gacqaH4oqCciGGJbGaai4BaiaacshadaahaaWcbe qaaiaaikdaaaGccqaH4oqCaaa@483E@ =    
 

sinθ+ cos 2 θ sin 2 θ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbiqaaWYbqqaaaa aaOpGqSvxza8qaciGGZbGaaiyAaiaac6gacqaH4oqCcqGHRaWkdaWc aaqaaiGacogacaGGVbGaai4CamaaCaaaleqabaGaaGOmaaaakiabeI 7aXbqaaiGacohacaGGPbGaaiOBamaaCaaaleqabaGaaGOmaaaakiab eI7aXbaaaaa@4940@

=      
1+ cos 2 θ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbiqaaWYbcaaIXa Gaey4kaSIaci4yaiaac+gacaGGZbWaaWbaaSqabeaacaaIYaaaaOGa eqiUdehaaa@3D45@ =    
 
csc  θ MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4HqaqFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaci4yaiaacohacaGGJbWaaWbaaSqabeaacaaIYaaaaGGacOGae8hUdehaaa@3B1C@

=

     
         
cosθcscθtanθ sinθ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcqqaaaaaaOpGqSv xza8qabiqaaWYbdaWcaaqaceaaSCGaci4yaiaac+gacaGGZbGaeqiU deNaci4yaiaacohacaGGJbGaeqiUdeNaciiDaiaacggacaGGUbGaeq iUdehabaGaci4CaiaacMgacaGGUbGaeqiUdehaaaaa@4B24@      
 
cosθ 1 sinθ sinθ cosθ sinθ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbiqaaWYbqqaaaa aaOpGqSvxza8qadaWcaaqaceaaSCGaci4yaiaac+gacaGGZbGaeqiU deNaeyOiGC7aaSaaaeaacaaIXaaabaGaci4CaiaacMgacaGGUbGaeq iUdehaaiabgkci3oaalaaabaGaci4CaiaacMgacaGGUbGaeqiUdeha baGaci4yaiaac+gacaGGZbGaeqiUdehaaaqaaiGacohacaGGPbGaai OBaiabeI7aXbaaaaa@53AA@ =    
 
1 sinθ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcqqaaaaaaOpGqSv xza8qabiqaaWYbdaWcaaqaceaaSCGaaGymaaqaaiGacohacaGGPbGa aiOBaiabeI7aXbaaaaa@3E52@ =    
 
csc  θ MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4HqaqFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaci4yaiaacohacaGGJbWaaWbaaSqabeaacaaIYaaaaGGacOGae8hUdehaaa@3B1C@ =      

الطرفان متساويان

       
sinθ(1+ cot 2 θ) MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcqqaaaaaaOpGqSv xza8qabiqaaWYbciGGZbGaaiyAaiaac6gacqaH4oqCcaGGOaGaaGym aiabgUcaRiGacogacaGGVbGaaiiDamaaCaaaleqabaGaaGOmaaaaki abeI7aXjaacMcaaaa@45C4@                      
 
sinθ csc 2 θ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbiqaaWYbqqaaaa aaOpGqSvxza8qaciGGZbGaaiyAaiaac6gacqaH4oqCcqGHIaYTciGG JbGaai4CaiaacogadaahaaWcbeqaaiaaikdaaaGccqaH4oqCaaa@4446@ =    
 

sinθ 1 sin 2 θ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbiqaaWYbqqaaaa aaOpGqSvxza8qaciGGZbGaaiyAaiaac6gacqaH4oqCcqGHIaYTdaWc aaqaaiaaigdaaeaaciGGZbGaaiyAaiaac6gadaahaaWcbeqaaiaaik daaaGccqaH4oqCaaaaaa@4522@

=      
1 sinθ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcqqaaaaaaOpGqSv xza8qabiqaaWYbdaWcaaqaaiaaigdaaeaaciGGZbGaaiyAaiaac6ga cqaH4oqCaaaaaa@3E1C@ =    
 
csc  θ MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4HqaqFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaci4yaiaacohacaGGJbWaaWbaaSqabeaacaaIYaaaaGGacOGae8hUdehaaa@3B1C@

=

     
         
cosθcscθtanθ sinθ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcqqaaaaaaOpGqSv xza8qabiqaaWYbdaWcaaqaceaaSCGaci4yaiaac+gacaGGZbGaeqiU deNaci4yaiaacohacaGGJbGaeqiUdeNaciiDaiaacggacaGGUbGaeq iUdehabaGaci4CaiaacMgacaGGUbGaeqiUdehaaaaa@4B24@      
 
cosθ 1 cosθ cosθ sinθ sinθ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbiqaaWYbqqaaaa aaOpGqSvxza8qadaWcaaqaceaaSCGaci4yaiaac+gacaGGZbGaeqiU deNaeyOiGC7aaSaaaeaacaaIXaaabaGaci4yaiaac+gacaGGZbGaeq iUdehaaiabgkci3oaalaaabaGaci4yaiaac+gacaGGZbGaeqiUdeha baGaci4CaiaacMgacaGGUbGaeqiUdehaaaqaaiGacohacaGGPbGaai OBaiabeI7aXbaaaaa@53A5@ =    
 
1 sinθ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcqqaaaaaaOpGqSv xza8qabiqaaWYbdaWcaaqaceaaSCGaaGymaaqaaiGacohacaGGPbGa aiOBaiabeI7aXbaaaaa@3E52@ =    
 
csc  θ MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4HqaqFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaci4yaiaacohacaGGJbWaaWbaaSqabeaacaaIYaaaaGGacOGae8hUdehaaa@3B1C@ =      

الطرفان متساويان

       
sinθ(1+ cot 2 θ) MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcqqaaaaaaOpGqSv xza8qabiqaaWYbciGGZbGaaiyAaiaac6gacqaH4oqCcaGGOaGaaGym aiabgUcaRiGacogacaGGVbGaaiiDamaaCaaaleqabaGaaGOmaaaaki abeI7aXjaacMcaaaa@45C4@                      
 
sinθ csc 2 θ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbiqaaWYbqqaaaa aaOpGqSvxza8qaciGGZbGaaiyAaiaac6gacqaH4oqCcqGHIaYTciGG JbGaai4CaiaacogadaahaaWcbeqaaiaaikdaaaGccqaH4oqCaaa@4446@ =    
 

sinθ 1 sin 2 θ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbiqaaWYbqqaaaa aaOpGqSvxza8qaciGGZbGaaiyAaiaac6gacqaH4oqCcqGHIaYTdaWc aaqaaiaaigdaaeaaciGGZbGaaiyAaiaac6gadaahaaWcbeqaaiaaik daaaGccqaH4oqCaaaaaa@4522@

=      
1 sinθ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcqqaaaaaaOpGqSv xza8qabiqaaWYbdaWcaaqaaiaaigdaaeaaciGGZbGaaiyAaiaac6ga cqaH4oqCaaaaaa@3E1C@ =    
 
csc  θ MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4HqaqFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaci4yaiaacohacaGGJbWaaWbaaSqabeaacaaIYaaaaGGacOGae8hUdehaaa@3B1C@

=

     
         
cosθcscθtanθ sinθ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcqqaaaaaaOpGqSv xza8qabiqaaWYbdaWcaaqaceaaSCGaci4yaiaac+gacaGGZbGaeqiU deNaci4yaiaacohacaGGJbGaeqiUdeNaciiDaiaacggacaGGUbGaeq iUdehabaGaci4CaiaacMgacaGGUbGaeqiUdehaaaaa@4B24@      
 
cosθ 1 sinθ sinθ cosθ sinθ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbiqaaWYbqqaaaa aaOpGqSvxza8qadaWcaaqaceaaSCGaci4yaiaac+gacaGGZbGaeqiU deNaeyOiGC7aaSaaaeaacaaIXaaabaGaci4CaiaacMgacaGGUbGaeq iUdehaaiabgkci3oaalaaabaGaci4CaiaacMgacaGGUbGaeqiUdeha baGaci4yaiaac+gacaGGZbGaeqiUdehaaaqaaiGacohacaGGPbGaai OBaiabeI7aXbaaaaa@53AA@ =    
 
1 sinθ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcqqaaaaaaOpGqSv xza8qabiqaaWYbdaWcaaqaceaaSCGaaGymaaqaaiGacohacaGGPbGa aiOBaiabeI7aXbaaaaa@3E52@ =    
 
csc  θ MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4HqaqFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaci4yaiaacohacaGGJbWaaWbaaSqabeaacaaIYaaaaGGacOGae8hUdehaaa@3B1C@ =      

الطرفان متساويان

       
            
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