Difference between revisions of "Derivative of cosine"
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| − | <strong>[[Derivative of cosine| | + | <strong>[[Derivative of cosine|Theorem]]:</strong> The following formula holds: |
| + | $$\dfrac{\mathrm{d}}{\mathrm{d}x} \cos(x) = -\sin(x),$$ | ||
| + | where $\cos$ denotes the [[cosine]] and $\sin$ denotes the [[sine]]. | ||
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<strong>Proof:</strong> █ | <strong>Proof:</strong> █ | ||
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