Find angle 'A ' if : - Vidyadip

Question

Find angle$ 'A\ '$ if :

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Answer

From the figure we have
$\sin A=\frac{\frac{10}{\sqrt{2}}}{10} $
$ \sin A=\frac{1}{\sqrt{2}} $
$\sin A=\sin 45^{\circ} $
$A=45^{\circ}$

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