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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig\Trig;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
use PhpOffice\PhpSpreadsheet\Calculation\MathTrig\Helpers;
class Tangent
{
/**
* TAN.
*
* Returns the result of builtin function tan after validating args.
*
* @param mixed $angle Should be numeric
*
* @return float|string tangent
*/
public static function tan($angle)
{
try {
$angle = Helpers::validateNumericNullBool($angle);
} catch (Exception $e) {
return $e->getMessage();
}
return Helpers::verySmallDenominator(sin($angle), cos($angle));
}
/**
* TANH.
*
* Returns the result of builtin function sinh after validating args.
*
* @param mixed $angle Should be numeric
*
* @return float|string hyperbolic tangent
*/
public static function tanh($angle)
{
try {
$angle = Helpers::validateNumericNullBool($angle);
} catch (Exception $e) {
return $e->getMessage();
}
return tanh($angle);
}
/**
* ATAN.
*
* Returns the arctangent of a number.
*
* @param float $number Number
*
* @return float|string The arctangent of the number
*/
public static function atan($number)
{
try {
$number = Helpers::validateNumericNullBool($number);
} catch (Exception $e) {
return $e->getMessage();
}
return Helpers::numberOrNan(atan($number));
}
/**
* ATANH.
*
* Returns the inverse hyperbolic tangent of a number.
*
* @param float $number Number
*
* @return float|string The inverse hyperbolic tangent of the number
*/
public static function atanh($number)
{
try {
$number = Helpers::validateNumericNullBool($number);
} catch (Exception $e) {
return $e->getMessage();
}
return Helpers::numberOrNan(atanh($number));
}
/**
* ATAN2.
*
* This function calculates the arc tangent of the two variables x and y. It is similar to
* calculating the arc tangent of y ÷ x, except that the signs of both arguments are used
* to determine the quadrant of the result.
* The arctangent is the angle from the x-axis to a line containing the origin (0, 0) and a
* point with coordinates (xCoordinate, yCoordinate). The angle is given in radians between
* -pi and pi, excluding -pi.
*
* Note that the Excel ATAN2() function accepts its arguments in the reverse order to the standard
* PHP atan2() function, so we need to reverse them here before calling the PHP atan() function.
*
* Excel Function:
* ATAN2(xCoordinate,yCoordinate)
*
* @param mixed $xCoordinate should be float, the x-coordinate of the point
* @param mixed $yCoordinate should be float, the y-coordinate of the point
*
* @return float|string the inverse tangent of the specified x- and y-coordinates, or a string containing an error
*/
public static function atan2($xCoordinate, $yCoordinate)
{
try {
$xCoordinate = Helpers::validateNumericNullBool($xCoordinate);
$yCoordinate = Helpers::validateNumericNullBool($yCoordinate);
} catch (Exception $e) {
return $e->getMessage();
}
if (($xCoordinate == 0) && ($yCoordinate == 0)) {
return Functions::DIV0();
}
return atan2($yCoordinate, $xCoordinate);
}
}