(i) Consider L.H.S. = = = (2-√3)

Consider R.H.S. = =

= (Rationalizing the denominator)

=

= 2 - √3

L.H.S. = R.H.S.

Hence, verified.

(ii) L.H.S. =

R.H.S. = cos 30° = √3/2

L.H.S. = R.H.S.

Hence, verified.