" 27."(x+cos x)/(tan x)

Find the derivative of (i)(x^(5)-cos x)/(sin x) (ii) (x+cos x)/(tan x)

tan ^ (- 1) ((cos x) / (1-tan x))

(tan x)/(1-cot x)-(cot x)/(1-tan x)=(sec x cos(x+1))

If (sin x + cos x)/(sin x - cos x) = (6)/(5) , then the value of (tan^(2) x + 1)/(tan^(2) x-1) is :

If int (f(x))/(log cos x) dx = - log(log cos x) + C , then f(x) is equal to a)tan x b) -sin x c) -cos x d) -tan x

Find the derivative with tan^(-1) ((sinx )/(1 + cos x)) with respect to tan^(-1) ((cos x)/(1 + sin x))

If (cos x)^(y)=(tan y)^(x), prove that (dy)/(dx)=(log tan y+y tan x)/(log cos x-x sec y cos ecy)

Prove that: (sinx)/(cos3x)+(sin3x)/(cos9x)+(sin9x)/(cos27 x)=(1/2)(tan27 x-tanx)

Prove that: (sinx)/(cos3x)+(sin3x)/(cos9x)+(sin9x)/(cos27 x)=(1/2)(tan27 x-tanx)

Prove that: (sinx)/(cos3x)+(sin3x)/(cos9x)+(sin9x)/(cos27 x)=(1/2)(tan27 x-tanx)