Question

If sin^4x + sin^2x = 1 then find the value of
cos^4x + cos^2x ​

Answer 1

sinx+sin

2

x=1

1−sin

2

x=sinx

cos

2

x=sinx

Thus,

cos

2

x+cos

4

x=sinx+sin

2

x=1

Hence, option c is correct