Can the Pythagorean theorem be used to substitute the denominator? I need to cancel out (cosθ+1) and end with

Sinθ/(cosθ-1)

Anonymous deleted answer

Could you type the questions , I am not sure about your questions.

Jason Silva unselected as best answer

Here is the question: Sinθ/cosθ-1 * cosθ+1/cosθ+1

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