Question

Answer this question......
I will not mark your as brainliest answer ​

Answer 1

Answer:

cos⁴x-sin⁴x = (cos²x+sin²x)(cos²x-sin²x)

= cos²x-sin²x

= 1-sin²x-sin²x

= 1-2sin²x

option a

Step-by-step explanation:

bruh

Answer 2

your answer is option a..

I have returned to my home.

are you so much busy??