public function testAsin()
{
$this->assertTrue(CMathf::equalsZt(CMathf::asin(0.0), 0.0));
$this->assertTrue(CMathf::equalsZt(CMathf::asin(1.0), CMathf::HALF_PI));
$this->assertTrue(CMathf::equalsZt(CMathf::asin(0.707106781), CMathf::PI / 4));
$this->assertTrue(CMathf::equalsZt(CMathf::asin(0.5), CMathf::PI / 6));
// Special cases.
$this->assertTrue(CMathf::equalsZt(CMathf::asin(1.5), CMathf::HALF_PI));
$this->assertTrue(CMathf::equalsZt(CMathf::asin(2.0), CMathf::HALF_PI));
$this->assertTrue(CMathf::equalsZt(CMathf::asin(-3.0), -CMathf::HALF_PI));
$this->assertTrue(CMathf::equalsZt(CMathf::asin(-10.0), -CMathf::HALF_PI));
$this->assertTrue(CMathf::equalsZt(CMathf::asin(1), 1.570796327));
}