MathAnalysisCalculusDerivatives

Derivatives of trigonometric functions

Find a derivative of quotient

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What is a derivative of $\dfrac{x^2}{\cos x}$ equal to?

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\dfrac{2x \cdot \cos x + x^2 \sin x}{\cos^2 x}

\dfrac{2x \cdot \cos x - x^2 \sin x}{\cos^2 x}

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\dfrac{2x \cdot \sin x + x^2 \cos x}{\cos^2 x}

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