nilai dari 2 sin (1/4π + x) sin ( 1/4π -x)
Matematika
fifi296
Pertanyaan
nilai dari 2 sin (1/4π + x) sin ( 1/4π -x)
2 Jawaban
-
1. Jawaban Anonyme
TriGonoMetRi
2 sin (1/4 π + x) sin (1/4 π - x)
= - (cos ((1/4 π + x) + (1/4π - x)) - cos ((1/4 π + x) - (1/4 π - x))
= - (cos (1/2 π) - cos 2x)
= - (0 - cos 2x)
= cos 2x ✔ -
2. Jawaban BrainlyHero
Cos 2x................