Question

Nilai dari sin (x-45°) adalah...

Answer 1

Verified answer

Jawab

sin(x - 45)  = sin x cos 45  - cos x sin 45
= sin x (1/2 √2 )  - cos x  (1/2 √2)
= 1/2 √2 ( sin x - cos )

Answer 2

Verified answer

TriGonoMetRi

sin (a - b) = sin a cos b - cos a sin b

••
sin (x - 45°)
= sin x cos 45° - cos x sin 45°
= sin x . 1/2 √2 - cos x . 1/2 √2
= 1/2 √2 (sin x - cos x) ✔