" The equation "2cos'x=cos^(4)(2x^(2)-1)" is satisfied by "

The equation 2cos^(-1)x=cos^(-1)(2x^(2)-1) is satisfied by

The equation 2Cos^(-1)x=Cos^(-1)(2x^(2)-1) is satisfied by

Equation 1+x^2+2x"sin"(cos^(-1)y)=0 is satisfied by

The equation 2 cos^(-1)x=sin^(-1)(2x sqrt(1-x^(2))) is valid for all values of x satisfying

Samllest positive angle satisfying the equation cos^(2)x+cos^(2) 2x+cos^(2)3x=1 , is

Samllest positive angle satisfying the equation cos^(2)x+cos^(2) 2x+cos^(2)3x=1 , is

Samllest positive angle satisfying the equation cos^(2)x+cos^(2) 2x+cos^(2)3x=1 , is

If K^(@) lies between 360^(@) and 540^(@) and K^(@) satisfies the equation 1+cos10x cos6x =2cos^(2)8x+sin^(2)8x," then "(K)/(10)=

If K^(@) lies between 360^(@) and 540^(@) and K^(@) satisfies the equation 1+cos10x cos6x =2cos^(2)8x+sin^(2)8x," then "(K)/(10)=