Question

$if \: \alpha and \beta are \: positive \: acute \: angles \: and \: cos2 \alpha equals \: to \: ncos2 \beta - 1 \div n - cos2 \beta \\ show \: that \: \sqrt{n - 1 \times tan \alpha = \sqrt{n + 1 \times tan \beta } }$
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Answer 1

what is this??????????

Answer 2

Step-by-step explanation:

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