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Show that 1+cot^2alpha / (1+cosec alpha)...

Show that `1`+`cot^2``alpha` `/` (1+`cosec` `alpha)`=`cosec` `alpha`

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To show that \[ \frac{1 + \cot^2 \alpha}{1 + \csc \alpha} = \csc \alpha \] we will start with the left-hand side and simplify it step by step. ...
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