Y=1/cosx если х=11пи/6

Question

Y=1/cosx если х=11пи/6

Answer 1

Cos(11π/6)=cos(12π/6-π/6)=cos(2π-π/6)=cosπ/6=√3/2
y=1/cos(11π/6)=1/(√3/2)=2/√3=2√3/3