(Q17)Evaluate the following
sec2 60° - tan2 60°
sin2 30° + cos2 30°

sec2 60° - tan2 60°
sin2 30° + cos2 30°
=
()2 - (√)2
(
1
)2 + (
√
2
)2
=
- 3
1
 +
4
 =
1 +
4
 =
1
4
 =
1
 =