Question

Jika diketahui sin a= 3/5 dan a sudut lancip .maka nilai sin 2a

Answer 1

Verified answer

Sin a = 3/5
cos a = 4/5
jadi,
sin 2a = 2 sin a. cos a
= 2 . 3/5 . 4/5
= 24/5

Answer 2

Kelas 10 Matematika
Bab Trigonometri

sin a = 3/5 → y/r

x = √(r² - y²)
x = √(5² - 3²)
x = √(25 - 9)
x = √16
x = 4

cos a = 4/5

sin 2a = 2 . sin a . cos a
sin 2a = 2 . 3/5 . 4/5
sin 2a = 24/25