1. Sin 30° x cos45° =.... 2. Cos 60° = sin.....° Tolong jawab dengan cara yg benar yaa!

Question

Matematika Diposting : 2017-06-07 Diupdate : 2022-05-25 ratifahifa1

Pertanyaan

1. Sin 30° x cos45° =....
2. Cos 60° = sin.....°

Tolong jawab dengan cara yg benar yaa!

Answer 1

1.
sin 30 * cos 45
= 1/2 * 1/2 akar2
= 1/4 akar 2

2.
cos 60 = sin 30

Answer 2

1.
sin 30 x cos 45
= 1/2 x (1/2 x √2)
= 1/4 √2 atau (√2)/4

2.

cos 60
= cos (90 - 30)
= sin 30