Question

Помогите!


обчисліть:1/√3*ctg4π/3+2cos7π/3

Answer 1

1/√3*ctg4π/3+2cos7π/3=1/√3*ctg(π+π/3)+2cos(2π+π/3)=
=1/√3*ctgπ/3+2cosπ/3=1/√3*1/√3+2*1/2=1/3+1=4/3.