Show that:`(sinx)/(cos3x)+(sin3x)/(cos9x)+(sin9x)/(cos27x)=1/2 (tan27x-tanx)`

Prove that: (sin x)/(cos3x)+(sin3x)/(cos9x)+(sin9x)/(cos27x)=((1)/(2))(tan27x-tan x)

Prove that sinx/cos(3x)+sin(3x)/cos(9x)+sin(9x)/cos(27x)=1/2 (tan27x-tanx)

(sin x) / (sin3x) + (sin3x) / (cos9x) + (sin9x) / (cos27x) = (tan27x-tan x) / (2)

Number of solutions (s) of the equation (sin x)/(cos 3x) +(sin 3x)/(cos 9x)+(sin 9x)/(cos 27 x)=0 in the interval (0, pi/4) is __________.

Number of solution(s) of the equation (sin x)/(cos3x)+(sin3x)/(cos3x)+(sin2x)/(cos27x)=0 in the interval (0,(pi)/(4)) is

(sinx+sin3x)/(cosx+cos3x) = tan2x

Prove that :(cos9x-cos5x)/(sin17x-sin3x)=(-sin2x)/(cos10x)

Show that, sin3x + cos3x = (cosx-sinx)(1+4sinx cosx)

Prove that: ,(cos9x-cos5x)/(sin17x-sin3x)=-(sin2x)/(cos10x)

(cos9x-cos5x)/(sin17x-sin3x)=-(sin2x)/(cos10x)