std::cos

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Defined in header <cmath>
float       cos( float arg );
double      cos( double arg );
long double cos( long double arg );
double      cos( Integral arg );
 （C++11 起）
计算余弦的arg
Original:
Computes cosine of arg
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[编辑] 参数

arg -
浮点值，表示以弧度表​​示的角度
Original:
floating point value representing angle in radians
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[编辑] 返回值

余弦arg的范围内[-1.0 ; 1.0]
Original:
cosine of arg in the range [-1.0 ; 1.0].
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域时会出现错误arg是无限的。 NAN是在这种情况下，返回.
Original:
Domain error occurs if arg is infinite. NAN is returned in that case.
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[编辑] 另请参阅
计算的正弦（sin(x)）
Original:
computes sine (sin(x))
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（函数） [edit]
计算角正切（tan(x)）
Original:
computes tangent (tan(x))
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（函数） [edit]
计算反余弦（arccos(x)）
Original:
computes arc cosine (arccos(x))
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（函数） [edit]
计算一个复数的余弦（cos(z)）
Original:
computes cosine of a complex number (cos(z))
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（函数模板） [edit]
std::cosvalarray的每个元素的功能
Original:
applies the function std::cos to each element of valarray
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（函数模板） [edit]
来自“http://zh.cppreference.com/mwiki/index.php?title=cpp/numeric/math/cos&oldid=29058”