Sin 5/6 v + cos 1 2/3 v=

Bab Trigonometri
Matematika SMA Kelas X

1 2/3 = 5/3

sin 5π/6 + cos 5π/3
= sin 150° + cos 300°
= sin (180° - 30°) + cos (360° - 60°)
= sin 30° + cos 60°
= 1/2 + 1/2
= 1