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| Summary | double __acos ( double x); /* number to calculate arc cosine of */ |
| Description | The __acos debugger function calculates the arc cosine of the floating-point number x. The value of x must be between -1 and 1. The floating-point value returned by __acos is a number in the 0 to π range. |
| Return Value | The __acos function returns the arc cosine of x. |
| See Also | |
| Example | > __acos(0.532); |
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