Question

Q.17. If SinA+Sin^2 A=1 the (Cos^2 A +Cos^4 A) is equal to ? *

Answer 1

Step-by-step explanation:

Here

${ \sin(a) }^{2} + { \sin(a)} < br > sin \: a = { \cos(a) }^{2}$

Sin^2 A=Cos^4 A

Putting this value in equation

Cos^2A+Cos^4A=SinA+Sin^2A

=1