15 lines
246 B
Plaintext
15 lines
246 B
Plaintext
acos - return the arccosine of a float
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float acos( float f );
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This efun is available only if PACKAGE_MATH is compiled in to the driver.
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Returns the arccosine of its argument, `f', measured in radians.
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See also:
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asin,
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atan,
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cos,
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sin,
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tan
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