Formula for `````2cos^-1x` and `3cos^-1x`

Formula for 2cos^(-1)x and 3cos^(-1)x

Formula for cos^(-1)(x)+-cos^(-1)(y)

2cos^(-1)x=cos^(-1)(2x^(2)-1)

Find the value of x satisfying the equation 2cos^(-1)(1-x)-3cos^(-1)x=pi

prove that 3 cos^(-1) x = cos^(-1) (4x^3 - 3x), x in [1/2,1]

Prove that : cos^(-1) x + cos^(-1) ((x)/(2) + (sqrt( 3-3x^2) )/( 2) ) = (pi)/ (3)

Prove that : cos^(-1) x + cos^(-1) ((x)/(2) + (sqrt( 3-3x^2) )/( 2) ) = (pi)/ (3)

If quad cos^(-1)x<1 and 1+sin(cos^(-1)x)+sin^(2)(cos^(-1)x)+sin^(3)(cos^(-1)x)+...oo=2 then the value of 12x^(2) is

If 0 < cos^-1(x) <1 and 1+sin(cos^(-1)x)+sin^2(cos^(-1)x)+sin^3(cos^(-1)x) + ..... =2 then the value of 12 x^2 is____

If 0