Lines Matching defs:cos
86 'cos' => \&cos,
327 return $self->{'cartesian'} = [$r * CORE::cos($t), $r * CORE::sin($t)];
679 # z^(1/n) = r^(1/n) (cos ((t+2 k pi)/n) + i sin ((t+2 k pi)/n))
833 # (cos)
835 # Compute cos(z) = (exp(iz) + exp(-iz))/2.
837 sub cos {
839 return CORE::cos($z) unless ref $z;
843 my $cx = CORE::cos($x);
860 my $cx = CORE::cos($x);
869 # Compute tan(z) = sin(z) / cos(z).
873 my $cz = &cos($z);
874 _divbyzero "tan($z)", "cos($z)" if $cz == 0;
881 # Computes the secant sec(z) = 1 / cos(z).
885 my $cz = &cos($z);
886 _divbyzero "sec($z)", "cos($z)" if ($cz == 0);
912 # Computes cot(z) = cos(z) / sin(z).
918 return &cos($z) / $sz;
1060 return (ref $z)->make(CORE::cos($y) * ($ex + $ex_1)/2,
1078 my $cy = CORE::cos($y);
1082 return (ref $z)->make(CORE::cos($y) * ($ex - $ex_1)/2,
1555 a = rho * cos(theta)
1560 z = rho * exp(i * theta) = rho * (cos theta + i * sin theta)
1661 cos(z) = 1/2 (exp(i * z1) + exp(-i * z))
1676 tan(z) = sin(z) / cos(z)
1679 sec(z) = 1 / cos(z)
1933 in root(), cos(), sin(), cosh(), sinh(), losing accuracy fast. Beware.