Question

Pertanyaan no. 66, dijawab menggunakan cara..

Answer 1

Verified answer

Cos x = 1/2 sin x
2 cos x = sin x
2 = (sin x)/(cos x)
2/1 = Tan x

Tan x = depan/samping = 2/1
miring = √(2^2 + 1^2) = √(4 + 1) = √5

Sin x = depan/miring = 2/√5
Cos x = samping/miring = 1/√5

Sin 2x = 2 sin x cos x = 2 . 2/√5 . 1/√5 = 4/5 (tak ada jawaban)

Jika yang ditanya sin x
Sin x = 2/√5 . √5/√5 = (2/5) √5

Answer 2

Jawaba nya 4/5 ga ada di pilgan