Вычислите! А). sin(p/4+3p) Б). cos(p/3-8p) В). sin(9*5/6*p)

Question

Вычислите!

А). sin(p/4+3p)

Б). cos(p/3-8p)

В). sin(9*5/6*p)

Answer 1

А). sin(π/4+3π)=sin(π/4+π+2π)=-sinπ/4=-√2/2

Б). cos(p/3-8p)=cosπ/3=1/2

В). sin(9*5/6*p)=sin(7π+π/2)=-sinπ/2=-1