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Question Number 106559 by MessiasAntonii last updated on 05/Aug/20

$$sen\left(7\right)=$$

Commented by bobhans last updated on 06/Aug/20

$$\cos \left(14°\right)=1-2\sin {}^2\left(7°\right)$$$$\sin \left(7°\right)=\sqrt{\frac{1-\cos \left(14°\right)}{2}}⌣\stackrel{\bullet }{\bullet }⌣$$

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