Trigonometry (mathematics): How do I prove that [math](1 + sin(theta))(1 – sin(theta)) = cos^2(theta)[/math]?
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Trigonometry (mathematics): How do I prove that [math](1 + sin(theta))(1 – sin(theta)) = cos^2(theta)[/math]?
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Trigonometry (mathematics): How do I prove that [math](1 + sin(theta))(1 – sin(theta)) = cos^2(theta)[/math]?