tentukan nilai 2 cos 60° tan 135° + 4 sin 210° - 3 cos 300°

2 cos 60° + 4 sin 210° - 3 cos 300°
= 2 (½) + 4 (sin(180°-30°)) - 3 (cos(270°+30°)
= 2 (½) + 4 ( sin 30° ) - 3 (cos 30°)
= 2 (½) + 4 (½) - 3 (½√3)
= 1 + 2 - 3/2 . 3√3
= 1 + 2 - 9/2 √3
= 3 - 9/2 √3

Maaf kalo salah ^^