2(tan 45°)²+(cos 30°)-(sin 60°)²​

TRIGONOMETRI

2 (tan 45°) + cos 30° -sin²60°

= 2 (1) + ½√3 -(½√3)²

= 2 + ½√3 -¾

= 5/4 + ½√3

= ¼ (5 + 2√3)