(1)/(2+3tan x)

[int(1)/((2sin x+3cos x)^(2))dx= 1) (1)/(2tan x+3)+c 2) (1)/(2(2tan x+3))+c 3) -(1)/(2(2tan x+3))+c 4) -(1)/(4(2tan x+3))+c]

d/dx tan^(-1) ((2+3 tan x)/(3-2 tan x)) =

If cos ((x) / (2)) cos ((x) / (2 ^ (2))) cos ((x) / (2 ^ (3))) ...... oo = (sin x ) / (x) (1) / (2) tan ((x) / (2)) + (1) / (2 ^ (2)) tan ((x) / (2 ^ (2))) + ( 1) / (2 ^ (3)) tan ((x) / (2 ^ (3))) ... oo

int frac{1}{4+5 cos^2 x} dx=.............. A) (1/3) tan^(-1) ((2/3)tan x) + c B) (1/6) tan^(-1) ((2/3)tan x) + c C) (1/4) tan^(-1) ((2/3)tan x) + c D) (1/3) tan^(-1) ((1/3)tan x) + c

Evaluate the following : lim_(xrarr 0)(1-cos^2 x)/(3 tan^2 x) .

Prove that tan 3x= (3tan x-tan^3 x)/(1-3tan^2 x)

Evaluate the following limit: lim_(x->0)(1-cos2x)/(3tan^2x)

lim_(x rarr0)(1-cos2x)/(3tan^(2)x)

Evaluate the following limits: lim((1-cos2x))/(3tan^(2)x)

Evaluate: underset(xrarr0)lim (1-cos2x)/(3tan^2x)