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-rw-r--r--sysdeps/libm-ieee754/s_ctanh.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/sysdeps/libm-ieee754/s_ctanh.c b/sysdeps/libm-ieee754/s_ctanh.c
index 7c9b3197ef..a16f9c8d02 100644
--- a/sysdeps/libm-ieee754/s_ctanh.c
+++ b/sysdeps/libm-ieee754/s_ctanh.c
@@ -48,11 +48,15 @@ __ctanh (__complex__ double x)
}
else
{
- double den = (__ieee754_cosh (2.0 * __real__ x)
- + __cos (2.0 * __imag__ x));
+ double sin2ix, cos2ix;
+ double den;
+
+ __sincos (2.0 * __imag__ x, &sin2ix, &cos2ix);
+
+ den = (__ieee754_cosh (2.0 * __real__ x) + cos2ix);
__real__ res = __ieee754_sinh (2.0 * __real__ x) / den;
- __imag__ res = __sin (2.0 * __imag__ x) / den;
+ __imag__ res = sin2ix / den;
}
return res;