1. Hitunglah A. Sin 45°.tan 45°+cos² 45° B. Tan 60°.cos 60°-sin 60° 2.tentukan nilai berikut ini A. Cot² 60°.tan² 60°+tan 45°.cot² 45°

1) sin 45°.tan 45° + cos^2 45°
= (1/2)akar 2. 1 + { (1/2)akar 2 }^2.
= (1/2)akar 2 + 1/2
= 1/2 ( 1 + akar 2)
b) tan 60°.cos 60° - sin 60°
= (sin 60° / cos 60°).cos 60° - sin 60°
= sin 60°- sin.60°
= 0
2) cot^2.60°.tan^2.60°+ tan 45°.cot^2.45°
= 1/tan^2.60°.tan^2.60°+ tan 45°.1/tan^2.45°
= 1 + 1/tan 45°
= 1 + 1/1
= 1 + 1
= 2

a.(1/2akar2 .1)+(1/2akar2)^2
=1/2 akar2 +1/4akar 2
=1/2 akar2
b.(akar3.1/2)-(1/2akar3)
=1/2akar3 - 1/2akar3
=0
2.
A.(1/3akar3)^2.(akar3)^2+ (1.1)^2
=1/6akar3.2akar3 +1
=2/6akar3
=1/3 akar3