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| 1. |
If sina+sin^2a=1 so prove that cos^2a+cos^4=1 |
| Answer» SinA + sin (sq) A =1SinA =1- sin(sq)A _(1) By identitySin(sq)A+cos(sq) A =11-sin(sq) A =cos(sq)AOn putting this value in _(1)Sin A=cos(sq)AOn squaringSin(sq) A= cos (raised to4) A _(2)We have to find Cos(sq) A + sin (sq) A from _(2) =1 by identity | |