Litipk\BigNumbers\Decimal::sec PHP Метод

    public function sec($scale = null)
    {
        $cos = $this->cos($scale + 2);
        if ($cos->isZero()) {
            throw new \DomainException("The secant of this 'angle' is undefined.");
        }
        return DecimalConstants::one()->div($cos)->round($scale);
    }