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Proposition: Derivative of Cosine

The derivative of the cosine function $f(x)=\cos(x),$ $x\in\mathbb R,$ is $$f'(x)=-\sin(x).$$

Table of Contents

Proofs: 1

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References

Bibliography

  1. Forster Otto: "Analysis 1, Differential- und Integralrechnung einer Veränderlichen", Vieweg Studium, 1983