Question

Упростить:
1_ (Sin(3/2*π + a) + Sin(2π + a))/(2Cos(-a)*Sin(-a) + 1)
2_ (Sin(2a))/(1 + Cos(2a))

Answer 1

2.2sinxcosx sin^2+cos^2 + cos^2- sin ^2 = 2sinxcosx2cosx^2 = tgx
1. -cosx+sinx2sin(-2x)+1