a) 2tgx + (tgx - 1)² = 2tgx + tg²x - 2tgx + 1 = tg²x + 1 = 1/Cos²x
б) (tgy + Ctgy)(1 + Cosy)(1 - Cosy) = (tgy + Ctgy)(1 - Cos²y) = (tgy + Ctgy) * Sin²y=
Copyright © 2025 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Verified answer
a) 2tgx + (tgx - 1)² = 2tgx + tg²x - 2tgx + 1 = tg²x + 1 = 1/Cos²x
б) (tgy + Ctgy)(1 + Cosy)(1 - Cosy) = (tgy + Ctgy)(1 - Cos²y) = (tgy + Ctgy) * Sin²y=