Trigonometry Examples

$\cos (60) + \frac{2}{3} \cdot \cos (30) = x \sin (o)$ , $\sin (60) - \frac{2}{3} \cdot \sin (30) = x \cos (o)$

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$\cos (60) + \frac{2}{3} \cdot \cos (30) = x \sin (o), \sin (60) - \frac{2}{3} \cdot \sin (30) = x \cos (o)$