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"If" tanA =(1-cosB)/(sinB), "then "tan2A...

`"If" tanA =(1-cosB)/(sinB), "then "tan2A =tanB`

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To prove that if \( \tan A = \frac{1 - \cos B}{\sin B} \), then \( \tan 2A = \tan B \), we will follow these steps: ### Step 1: Start with the given equation We have: \[ \tan A = \frac{1 - \cos B}{\sin B} \] ...
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