Number of solutions (s) of the equations
`cos^(-1) ( 1-x) - 2 cos^(-1) x = pi/2` is

Number of solution (s) of the equations cos^(-1) ( cos x) = x^(2) is

Number of solution (s) of the equations cos^(-1) ( cos x) = x^(2) is

Number of solution (s) of the equations cos^(-1) ( cos x) = x^(2) is

Number of solution (s) of the equations cos^(-1) ( cos x) = x^(2) is

Number of solutions of the equation cos^(-1)(1-x)-2cos^(-1)x=pi/2 is

The number of solutions of the equation cos^(-1)((1+x^2)/(2x))-cos^(-1)x=pi/2+sin^(-1)x is 0 (b) 1 (c) 2 (d) 3

The number of solutions of the equation cos^(-1)((1+x^2)/(2x))-cos^(-1)x=pi/2+sin^(-1)x is 0 (b) 1 (c) 2 (d) 3

The number of solutions of the equation cos^(-1)((1+x^2)/(2x))-cos^(-1)x=pi/2+sin^(-1)x is 0 (b) 1 (c) 2 (d) 3

The number of solutions of the equation cos^(-1)((1+x^2)/(2x))-cos^(-1)x=pi/2+sin^(-1)x is 0 (b) 1 (c) 2 (d) 3