The value of `(cos 15^(@) -sin 15^(@))` is-

The value of (cos 15^(@) - sin 15^(@))/(cos 15^(@) + sin 15^(@) is

The value of cos15^(@)-sin15^(@) is

The value of sqrt(2)(cos15^(@)-sin15^(@)) is equal to a) sqrt(3) b) sqrt(2) c)1 d)2

The value of cos15^@-sin15^@ is

What is the value of |{:(cos 15^(@),sin 15^(@)),(cos 45^(@),sin 45^(@)):}|xx|{:(cos 45^(@),cos 15^(@)),(sin 45^(@),sin 15^(@)):}| ?

The value of cos^(2)45^(@)-sin^(2)15^(@) is

The value of cos^2 45^@-sin^2 15^@ is

The value of sqrt(2) (cos 15^@ - sin 15^@ ) is equal to