Question

cos(-π/4)+cosπ/3+cos(-π/6)​

Answer 1

Ответ:

Воть. Может поможет..

Answer 2

cos(-p/4)+cos(p/3)+cos(-p/6)=cos(p/4)+cos(p/3)+cos(p/6)=√2/2+1/2+√3/2=

(1+√2+√3)/2