2,(1)/(2+cos x)

Evaluate: int_0^pie^(cos x)(2sin(1/2cos x)+cos(1/2cos x))sinx dxdot

show that, tan^(-1) ((1)/(sqrt(3)) tan ""(x)/(2))=(1)/(2) cos^(-1) ""((1+2 cos x)/(2+ cos x)).

If: (1- cos 2x)/(1+ cos 2x)=3 , then: x =

int_(0)^((pi)/(2))(1+2cos x)/((2+cos x)^(2))dx

The vlaue of is lim_(xrarr(x)/(2))(1^((1)/(cos^(2)x))+2^((1)/(cos^(2)x))+…………..+10^((1)/(cos^(2)x))) equal to

(tan3x)/(tan x)=(2cos2x+1)/(2cos2x-1)

int(2+sin2x)/(1+cos2 x)dx

Solve the equation 2(cos x+cos2x)+sin2x(1+2cos x)=2sinx for (-pilt=xlt=pi)

Solve the equation 2(cos x+cos2x)+sin2x(1+2cos x)=2sinx for (-pilt=xlt=pi)

Solve the equation 2(cos x+cos2x)+sin2x(1+2cos x)=2sinx for (-pilt=xlt=pi)