cos²t - cos⁴t + sin⁴t =
= cos²t (1 - cos²t) + sin⁴t =
= cos²t sin²t + sin⁴t =
= sin²t (cos²t + sin²t) =
= sin²t
Copyright © 2025 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
cos²t - cos⁴t + sin⁴t =
= cos²t (1 - cos²t) + sin⁴t =
= cos²t sin²t + sin⁴t =
= sin²t (cos²t + sin²t) =
= sin²t