Question

Sa se aduca la forma cea mai simpla expresia:
1)Cos^2( α)-cos^4(α)+sin^4(α)+tg(α)*cos(α)
2)Sin(α)-sin^3(α)-cos(α)+cos^3(α)
3)(tg(α)+ctg(α))(1-sin(α))(1+sin(α))

Answer 1

Sper sa intelegi rezolvarile.