`cos^2(x) - sin^2(x)` is equal to:

The value of log_(sin^(2)x+cos^(4)x+2)(cos^(2)x+sin^(4)x+2) is equal to

underset(x to 0)lim (e^(x^(2))-cos x)/(sin^(2) x) is equal to :

int(sin^2x-cos^2x)/(sin^2cos^2x)dx is equal to (A) tanx+cotx+c (B) tanx+cose c""x+c (C) -tanx+cot""x+c (D) tanx+sec""x+c

lim_(x->0) (1-cos x cos 2x cos 3x)/ (sin^2 2x) is equal to a) 3/4 b) 7/4 c) 7/2 d) -3/4

lim_(x rarr0)(e^(x^(2))-cos x)/(sin^(2)x) is equal to

The value of lim _( x to 0^(+))(int _(1)^(cos x) (cos ^(-1) t )dt)/(2x - sin 2x) is equal to:

The number of values of x lying in the inteval -(2pi, 2pi) satisfying the equation 1+cos 10x cos 6x=2 cos^(2)8x+sin^(2)8x is equal to

If 1+2sin x+3sin^(2)x+4sin^(3)x+... upto infinite terms = 4 and number of solutions of the equation in [ (-3pi)/(2), 4pi] is k. The value of |(cos2x-1)/(sin2x)| is equal to