If `Cos20^0=k` and `Cosx=2k^2-1`, then the possible values of x between `0^0 and 360^0` are

If K = cos 20^(@) and cos x = 2K^(2) - 1 , then the possible value of x between 0^(@) and 360^(@) are

If sin32^(@)=k and cos x=1-2k^(2) alpha, beta are the values of x between 0^(@) and 360^(@) with alpha < beta then

If cos40^(@)=xandcostheta=1-2x^(2) , then the possible values of theta lying between 0^(@) and 360^(@) is

If cos40^(@)=xandcostheta=1-2x^(2) , then the possible values of theta lying between 0^(@) and 360^(@) is

For what value of x between 0^(@) and 360^(@) does cos 2x=2cos x?

Let g:R rarr(0,(pi)/(3)) be defined by g(x)=cos^(-1)((x^(2)-k)/(1+x^(2))). Then find the possible values of k for which g is a surjective function.

If int_0^1(3x^2+2x+k)dx=0, find the value of k