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.rm #[ #] #H #V #F C
.IX Title "cosh Cg"
.TH cosh Cg "" "Cg Toolkit 2.2" "Cg Standard Library"
.UC
.SH "NAME"
\&\fBcosh\fR \- returns hyperbolic cosine of scalars and vectors.
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 5
\&  float  cosh(float a);
\&  float1 cosh(float1 a);
\&  float2 cosh(float2 a);
\&  float3 cosh(float3 a);
\&  float4 cosh(float4 a);
.Ve
.Vb 5
\&  half   cosh(half a);
\&  half1  cosh(half1 a);
\&  half2  cosh(half2 a);
\&  half3  cosh(half3 a);
\&  half4  cosh(half4 a);
.Ve
.Vb 5
\&  fixed  cosh(fixed a);
\&  fixed1 cosh(fixed1 a);
\&  fixed2 cosh(fixed2 a);
\&  fixed3 cosh(fixed3 a);
\&  fixed4 cosh(fixed4 a);
.Ve
.SH "PARAMETERS"
.IX Header "PARAMETERS"
.Ip "a" 8
.IX Item "a"
Vector or scalar of which to determine the hyperbolic cosine.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Returns the hyperbolic cosine of \fIa\fR.
.PP
For vectors, the returned vector contains the hyperbolic cosine of each
element of the input vector.
.SH "REFERENCE IMPLEMENTATION"
.IX Header "REFERENCE IMPLEMENTATION"
\&\fBcosh\fR for a scalar \fBfloat\fR could be implemented like this.
.PP
.Vb 4
\&  float cosh(float x)
\&  {
\&    return 0.5 * (exp(x)+exp(-x));
\&  }
.Ve
.SH "PROFILE SUPPORT"
.IX Header "PROFILE SUPPORT"
\&\fBcosh\fR is supported in all profiles except fp20.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
acos, cos, exp, sinh, tanh
