Find the value of `cos^(2)112 1/2-sin^(2)52 1/2`.

Find the value of cos^(2)52(1^@)/(2) - sin^(2)22 (1^@)/2

Find the value of cos^(2)112^((1^(0))/(2))-sin^(2)52^((1^(0))/(2)) cos^(2)52^((1^(0))/(2))-sin^(2)22^((1^(0))/(2))

Find the value of: cos^(-1)(1/2)+2sin^(-1)(1/2)

Find the value of 2 cos ^(-1) (1/2) +sin^(-1) (1/2)

Find the value of cos^(-1) (1/2) +2 sin^(-1)(1/2)

Find the value of cos^(-1) (-1/2) -2 sin^(-1) (-1/2)

Find the value of cos^(-1)(1/2)+2sin^(-1)(1/2)

Find the value of cos^(-1)(1/2)+sin^(-1)(-1)