Question

i
$if \: \sin \: x + \sin ^{2} x = 1 \: then \: \cos ^{2} x + \cos ^{4} x \: is \: equal \: to \: ...$

Answer 1

hey !!!

sinx + sin²x = 1 ---------1)

=> sinx = 1 - sin²x

=> sinx = cos²x ---------2)

and if sinx = cos⁴x -------3)

so....cos²x + cos⁴x = 1 ( from 2 and 3 equation)

then cos²x + cos⁴x =1 .

hope it helps you !!

@Rajukumar111