Question

Giải PT

a1)  \(\dfrac{\left(1-2\sin x\right)\cos x}{\left(1+2\sin x\right)\left(1-\sin x\right)}=\sqrt{3}\)

a2) \(2\sin17x+\sqrt{3}\cos5x+\sin5x=0\)

a3) \(\)\(\cos7x-\sin5x=\sqrt{3}\left(\cos5x-\sin7x\right)\)

a4) \(\sqrt{3}\cos5x-2\sin3x\cos2x-\sin x=0\)

a5) \(\tan x+\cot x=2\left(\sin2x+\cos2x\right)\)