1. Tentukan nilai : a. sin 30 + cos 60 b. cot 30 x sec 45 + tan 45 c. sin² 60 + cos² 60 2. Diketahui sin a = ½ carilah : a. tan a° b. cot a °

1.a. 1/2+1/2=1
b.
[tex] \sqrt{3} \times \sqrt{2} + 1 = \sqrt{6} + 1[/tex]

1.)
a. sin 30 + cos 60
= 1/2 + 1/2
= 2/2 = 1

b. cot 30 × sec 45 + tan 45
= 1/Tan × 1/cos + 1
= 1/⅓√3 × 1/½√2 + 1
= √3 × 2/√2 + 1
= 2√6 + 1

c. sin²60 + cos²60
= (½√3)² + (½)²
= (1/4 × 3) + (1/4)
= ¾ + ¼
= 4/4
= 1


2.)
diket: sin a = ½
sin =depan/miring (segitiga siku siku) samping= √2²-1² (rumus phytaghoras)
samping= √4-1
samping= √3

a.) Tan a°
Tan a°=depan/samping
Tan a°= 1/√3

b.) cot a°
cot a°= 1/tan
cot a°= 1/1/√3
cot a°= √3



semoga membantu, maaf kalo salah:')