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ACOS

Description

Returns the arccosine (the inverse of the cosine function) of the specified number. The arccosine is the angle whose cosine is the specified number. The resulting angle is given in radians in the range zero to pi.

Examples

ACOS(0.5) = 1.0471975511966

ACOS(3) = NAN

ACOS(NAN) = NAN

ACOS(INF) = NAN

ACOS(-INF) = NAN

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