Find the value of `sin 330^@ + tan225^@-4 sin^2 120^@ + 2 cos^2 135^@ + sec^2 180^@`

Find the value of sin 420^@ cos 330^@ .

Find value of. sin^2 120^@

Find the value of: sec^2(tan^-1(2))

Find the value of 1/(2sin10^@)-2sin70^@

The value of sin^2 30^@-cos^2 30^@ is:

The value of sin^2 29^@+sin^2 61^@

Find value of cos^2 180^@

The value of cos^2 37^@-sin^2 53^@ is

Find the value of: sin^-1(sin(frac{2pi}{3}))

Find the value of (sin^3(360^@+45^@)tan(180^@-45^@)sec^2(-45^@))/(cos^2(270^@+45^@)cosec^2(180^@+45^@)sin(-45^@))