Question

[Thư Nguyễn]

Giải các phương trình sau:

a) Sinx + \(\sqrt{3}\) Cosx + 2Sin(\(\dfrac{\Pi}{6}\)-x) = \(\sqrt{2}\)

b) 3Cosx - 4Sinx + \(\dfrac{2}{3Cosx-4Sinx-6}\)= 3

c) 8Sinx = \(\dfrac{\sqrt{3}}{Cosx}+\dfrac{1}{Sinx}\)

d) 3Sin3x - \(\sqrt{3}\) Cos9x = 1 + 4Sin³3x

e) 5Sin2x - 6Cos²x = 13

f) Cos7x - \(\sqrt{3}\) Sin7x - Sinx = \(\sqrt{3}\) Cos x