Question

Sin 2Π/3 + sin 7Π/3=…

Answer 1

Asumsikan:
π = 180 derajat.
Sehingga,
sin 2π/3 + sin 7π/3
= sin 2/3 x 180 + sin 7/3 x 180
= sin 120 + sin 420
= sin(180-60) + sin(360+60)
= sin 60 + sin 60
= 2 x sin 60
= 2 x ½ √3
= √3