Question

Jika 0° <_ x <_ 360°, tentukanlah nilai x:
a. sin x = 0,5
b. cos x = 1/2 akar 2
c. tan x = 1/3 akar 3

Answer 1

Bag a.
sin x = sin 30
x = 30
x = (180-30) = 150
Solusi:
x = {30, 150}

Bag b.
cos x = 1/2 √2
cos x = cos 45
x = 45
x = -45 + 360 = 315
Solusi:
x = {45, 315}

Bag c.
tan x = 1/3 √3
tan x = tan 30
x = 30
x = 30 + 180 = 210
Solusi:
x = {30, 210}