AM-2626

Trigonometric equations

A Math · Secondary 4 · Hard · Trigonometric equations

1. $\dfrac{\sqrt{13}-3}{2}$
2. $\dfrac{3-\sqrt{13}}{2}$
3. $\dfrac{\sqrt{13}+3}{2}$
4. $\dfrac{3+\sqrt{13}}{2}$

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