std::acos
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<cmath>
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<td class="t-dcl-nopad">float acos( float arg );
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<td class="t-dcl-nopad">double acos( double arg );
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<td class="t-dcl-nopad">long double acos( long double arg );
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<td >double acos( Integral arg );
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Computes arc cosine of arg
Parameters
arg | - | floating point value |
Return value
Arc cosine of arg
in radians in the range of [0; π]
radians.
Domain error occurs if arg
is outside the range [-1.0; 1.0]
. NAN is returned in that case.