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

The value of cos22(1^(@))/(2) is

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

Find the value of sin^(2)52(1^(@))/(2)-cos^(2)7(1^(@))/(2)

Find the value of cos[22(1/2)]^o

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

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