Question

Решить уравнение! cos^2(x-p/4)+sin^2(x/2)=1

Answer 1

(1+cos(2x-π/2))/2+(1-cosx)=1
1+sin2x+1-cosx=2
2sinxcosx-cosx=0
cosx(2sinx-1)=0
cosx=0⇒x=π/2+πn,n∈z
sinx=1/2⇒x=(-1)^k*π/6+πk,k∈z