function testCsch()
 {
     /*{{{*/
     $tmp = Math_ComplexOp::csch($this->cnum1);
     $this->assertEquals('0.828447184875 - 1.55359823247i', $tmp->toString());
 }
echo "atan(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::asec($a);
echo "asec(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::acsc($a);
echo "acsc(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::acot($a);
echo "acot(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::sinh($a);
echo "sinh(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::cosh($a);
echo "cosh(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::tanh($a);
echo "tanh(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::sech($a);
echo "sech(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::csch($a);
echo "csch(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::coth($a);
echo "coth(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::asinh($a);
echo "asinh(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::acosh($a);
echo "acosh(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::atanh($a);
echo "atanh(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::asech($a);
echo "asech(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::acsch($a);
echo "acsch(a) = " . $z->toString() . "\n";
$z = Math_ComplexOp::acoth($a);
echo "acoth(a) = " . $z->toString() . "\n";