Question

Calculați: a) 2 sin 30° + 3 cos 60° + tg 45° ! ;
b) 2 cos 120° - 2 tg 45° + ctg 45°

Answer 1

2*1/2+3*1/2+1=5/2+1=7/2=3.5
2*-cos(pi-120)-2*1+1=2*-cos60-2+1=-1-2+1=-2