diff options
Diffstat (limited to 'src/pkg/math/sinh.go')
| -rw-r--r-- | src/pkg/math/sinh.go | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/src/pkg/math/sinh.go b/src/pkg/math/sinh.go index 968b89b6d..8d70cd3dd 100644 --- a/src/pkg/math/sinh.go +++ b/src/pkg/math/sinh.go @@ -21,22 +21,22 @@ package math func Sinh(x float64) float64 { // The coefficients are #2029 from Hart & Cheney. (20.36D) const ( - P0 = -0.6307673640497716991184787251e+6; - P1 = -0.8991272022039509355398013511e+5; - P2 = -0.2894211355989563807284660366e+4; - P3 = -0.2630563213397497062819489e+2; - Q0 = -0.6307673640497716991212077277e+6; - Q1 = 0.1521517378790019070696485176e+5; - Q2 = -0.173678953558233699533450911e+3; + P0 = -0.6307673640497716991184787251e+6 + P1 = -0.8991272022039509355398013511e+5 + P2 = -0.2894211355989563807284660366e+4 + P3 = -0.2630563213397497062819489e+2 + Q0 = -0.6307673640497716991212077277e+6 + Q1 = 0.1521517378790019070696485176e+5 + Q2 = -0.173678953558233699533450911e+3 ) - sign := false; + sign := false if x < 0 { - x = -x; - sign = true; + x = -x + sign = true } - var temp float64; + var temp float64 switch true { case x > 21: temp = Exp(x) / 2 @@ -45,15 +45,15 @@ func Sinh(x float64) float64 { temp = (Exp(x) - Exp(-x)) / 2 default: - sq := x * x; - temp = (((P3*sq+P2)*sq+P1)*sq + P0) * x; - temp = temp / (((sq+Q2)*sq+Q1)*sq + Q0); + sq := x * x + temp = (((P3*sq+P2)*sq+P1)*sq + P0) * x + temp = temp / (((sq+Q2)*sq+Q1)*sq + Q0) } if sign { temp = -temp } - return temp; + return temp } // Cosh returns the hyperbolic cosine of x. @@ -64,5 +64,5 @@ func Cosh(x float64) float64 { if x > 21 { return Exp(x) / 2 } - return (Exp(x) + Exp(-x)) / 2; + return (Exp(x) + Exp(-x)) / 2 } |