| Calling Sequence | cos(x)
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| Parameters |
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| Return Type | numeric | |||||||||
| Synopsis | This function computes the trigonometric cosine function. cos(x) has simple zeros at at x=Pi/2+n*Pi. | |||||||||
| References | Handbook of Mathematical Functions, M. Abramowitz and I. Stegun, Ch 4.3 | |||||||||
| Examples | > cos(0); 1 > cos(Pi/4); 0.7071 > cos(Pi/2); 6.123e-17 > cos(-Pi); -1 | |||||||||
| See also | arcsin, arctan, sin, tan | |||||||||