Question

Вычислите:

(sin 11п/4-cos13п/4)*sin(-2.5п):cos(-25п/3)

Answer 1

(sin 11п/4-cos13п/4)*sin(-2.5п):cos(-25п/3)=

=(sin(3/4п-сos(-3/4П))*sin(-П/2)/ cos(-П/3)=sqrt(2)*(-1)/(1/2)=-2sqrt(2)