If `cos(2cos^(-1)x)=(1)/(8)` then value of X=
(A)`4/3` (B) `(3)/(4)`(C) `(31)/(32)` (D) 1

The value of cos((1)/(2)cos^(-1)((1)/(8))) is (a) (3)/(4) (b) -(3)/(4)( c) (1)/(16)(d)(1)/(4)

If sin^(3)x cos3x+cos^(3)x sin3x=(3)/(8), then the value of sin4x is (1)/(2)(b)1(c)-(1)/(2)(d)0

If cos^(-1)(cos 4)gt3x^(2)-4x then

If sin^(4)x + cos^(4)x=k then possible value of k is/are : (A) 1/2 (B) 1/4 (C) 1 (D) 7/10

If (2+(1)/(3(4)/(5)))/(2+(1)/(3+(1)/(4)))=x, then the value of x is (1)/(7) (b) (3)/(7)(c)1(d)(8)/(7)

If 8^(x) = (4)/(2^(x)) then find x A)1 B)2 C) (1)/(2) D) (2)/(3)

If (sin^(4)A)/(a)+(cos^(4)A)/(b)=(1)/(a+b), then the value of (sin^(8)A)/(a^(3))+(cos^(8)A)/(b^(3)) is equal to (A) (1)/((a+b)^(3)) (B) (a^(3)b^(3))/((a+b)^(3))(C)(a^(2)b^(2))/((a+b)^(2)) (D) none of these

Let y(x) be the solution of the differential equation (dy)/(dx)+(3y)/(cos^(2)x)=(1)/(cos^(2)x) and y((pi)/(4))=(4)/(3) then vaue of y(-(pi)/(4)) is equal to (a)-(4)/(3)(b)(1)/(3)( c) e^(6)+(1)/(3)(d)3

The value of f(1) so that the function f(x)=(1-cos(1-cos x))/(x^(4)) is continuous everywhere is (A) (1)/(2)(B)(1)/(4)(C)(1)/(8)(D)2