Question

Тригонометрия! Помогите 3sin П/2+4cos 2П/3+6sin 13П/6

Answer 1

3 sin π/2  +4cos 2π/3 +6sin 13π/6=3*1+4 *0 + 6sin(2π+π/6)=3+6sin π/6=
=3+6* 1/2=3+3=6