AM-1009

Trigonometric equations

A Math · Secondary 3 · Medium · Trigonometric equations

Solve the equation

3\cos x - 2 = 0

for

0^\circ \le x \le 360^\circ

.

$48.2^\circ$ and $311.8^\circ$
$48.2^\circ$ and $131.8^\circ$
$228.2^\circ$ and $311.8^\circ$
$131.8^\circ$ and $228.2^\circ$

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