1+cos^(2)2A" is equal to "

lim_(x->0)((xtan2x-2xtanx)/(1-cos2x)^2) is equal to

the value of lim_(x rarr0)(x tan2x-2x tan x)/((1-cos2x)^(2)) is equal to

lim_(x rarr0)((x tan2x-2x tan x)/((1-cos2x)^(2))) is equal to

int_(0)^(pi//2) (sin 2x )/( 1 + 2 cos^(2) x) dx is equal to

int(1)/(sin^(2)x.cos^(2)x)dx is equal to

If cos2x+2 cos x=1 , then (sin^(2)x)(2-cos^(2)x) is equal to

If cos2x+2 cos x=1 , then (sin^(2)x)(2-cos^(2)x) is equal to

int 1/(sin^2x cos^2x )dx is equal to:

If a,b and /_A are given in a triangle and c_(1),c_(2) are the possible values of the remaining side,then c_(1)^(2)+c_(2)^(2)-2c_(1)c_(2)cos2A is equal to: