Question

Спростити!!!!!!!!!!!!!

Answer 1

a) sin(a-b) - sin(a)cos(b) = sin(a)cos(b) - cos(a)sin(b) - sin(a)cos(b) = -cos(a)sin(b)

б) sin((3*p)/2 + a) + cos(p - a) = -cos(a) - cos(a) = -2cos(a)