Question

Simplifique:
a) y=3 sen 3π/2 + cos 2π
b) y=2 sen π + 3 cos 2π/3

Answer 1

sen(3pi/)=-1
cos (2pi)=1
y=3*(-1)+1=-3+1=-2

sen 2pi/3=cos 120=-cos 60=-1/2
2.0+3.-1/2
0-3/2
-3/2