Question

sinx/2-11cosx/4=0 Помогите пожалуйста!

Answer 1

$sin( frac{x}{2} ) - 11 cos( frac{x}{4} ) = 0 \ 2 sin( frac{x}{4} ) cos( frac{x}{4} ) - 11 cos( frac{x}{4} ) = 0 \ cos( frac{x}{4} ) times (2 sin( frac{x}{4} - 11 ) = 0 \ cos( frac{x}{4} ) = 0 \ 2 sin( frac{x}{4} ) - 11 = 0 \ x = 2pi + 4npi$