diff options
Diffstat (limited to 'libgo/go/cmath/tan.go')
| -rw-r--r-- | libgo/go/cmath/tan.go | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/libgo/go/cmath/tan.go b/libgo/go/cmath/tan.go index 94b5175..67dc22a 100644 --- a/libgo/go/cmath/tan.go +++ b/libgo/go/cmath/tan.go @@ -58,7 +58,7 @@ import "math" // Tan returns the tangent of x. func Tan(x complex128) complex128 { d := math.Cos(2*real(x)) + math.Cosh(2*imag(x)) - if math.Fabs(d) < 0.25 { + if math.Abs(d) < 0.25 { d = tanSeries(x) } if d == 0 { @@ -109,8 +109,8 @@ func reducePi(x float64) float64 { // Taylor series expansion for cosh(2y) - cos(2x) func tanSeries(z complex128) float64 { const MACHEP = 1.0 / (1 << 53) - x := math.Fabs(2 * real(z)) - y := math.Fabs(2 * imag(z)) + x := math.Abs(2 * real(z)) + y := math.Abs(2 * imag(z)) x = reducePi(x) x = x * x y = y * y @@ -139,7 +139,7 @@ func tanSeries(z complex128) float64 { t = y2 - x2 t /= f d += t - if math.Fabs(t/d) <= MACHEP { + if math.Abs(t/d) <= MACHEP { break } } @@ -174,7 +174,7 @@ func tanSeries(z complex128) float64 { // Cot returns the cotangent of x. func Cot(x complex128) complex128 { d := math.Cosh(2*imag(x)) - math.Cos(2*real(x)) - if math.Fabs(d) < 0.25 { + if math.Abs(d) < 0.25 { d = tanSeries(x) } if d == 0 { |