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<?php
use \Litipk\BigNumbers\Decimal as Decimal;
use \Litipk\BigNumbers\DecimalConstants as DecimalConstants;
use PHPUnit\Framework\TestCase;
/**
* @group tan
*/
class DecimalTanTest extends TestCase
{
public function tanProvider() {
// Some values providede by mathematica
return [
['1', '1.55740772465490', 14],
['123.123', '0.68543903342472368', 17],
['15000000000', '-0.95779983511717825557', 20]
];
}
* @dataProvider tanProvider
public function testSimple($nr, $answer, $digits)
$x = Decimal::fromString($nr);
$tanX = $x->tan($digits);
$this->assertTrue(
Decimal::fromString($answer)->equals($tanX),
'tan('.$nr.') must be equal to '.$answer.', but was '.$tanX
);
* @expectedException \DomainException
* @expectedExceptionMessage The tangent of this 'angle' is undefined.
public function testTanPiTwoDiv()
$PiDividedByTwo = DecimalConstants::PI()->div(Decimal::fromInteger(2));
$PiDividedByTwo->tan();
Litipk /
php-bignumbers
