\"\"

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The function is \"\".

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Apply derivative on each side with respect to \"\".

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\"\"

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Quotient rule of derivatives: \"\".

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\"\"

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Derivative of sine function : \"\".

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Derivative of cosine function : \"\".

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\"\"

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Pythagorean identity : \"\".

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\"\"

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\"\".

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\"\"

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\"\".