AM-1015

Trigonometric equations

A Math · Secondary 3 · Medium · Trigonometric equations

Solve the equation

3\cos\theta = 1

for

0^\circ \le \theta \le 360^\circ

.

$70.5^\circ,\ 289.5^\circ$
$70.5^\circ,\ 109.5^\circ$
$109.5^\circ,\ 250.5^\circ$
$90^\circ,\ 270^\circ$

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