If $ an A = 1$, then $2 \sin A \cos A = $ ________.

Question

If $	an A = 1$, then $2 \sin A \cos A = $ ________.

Accepted Answer

Step 1: $	an A = 1 \Rightarrow A = 45°$. $2 \sin 45° \cos 45° = 2 	imes \frac{1}{\sqrt{2}} 	imes \frac{1}{\sqrt{2}} = 1$

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