AM-2491

Trigonometric equations

A Math · Secondary 4 · Hard · Trigonometric equations

1. $\theta=45^\circ,146.3^\circ,225^\circ,326.3^\circ$
2. $\theta\approx56.3^\circ,135^\circ,236.3^\circ,315^\circ$
3. $\theta=33.7^\circ,213.7^\circ$
4. $\theta=146.3^\circ,326.3^\circ$ only

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