func (d Decimal) Tan() Decimal {
	return Decimal{
		decimal: d.decimal.Tan(),
		vars:    tan + leftParen + d.vars + rightParen,
		formula: tan + leftParen + d.formula + rightParen,
	}
}
// Tan returns the tangent of the radian argument x.
Tan returns the tangent of the radian argument x.
// Tan returns the tangent of the radian argument x .
func (d Decimal) Tan() Decimal {
	return Decimal{
		decimal: d.decimal.Tan(),
		vars:    tan + leftParen + d.vars + rightParen,
		formula: tan + leftParen + d.formula + rightParen,
	}
}
func ( d Decimal ) Tan ( ) Decimal { return Decimal { decimal : d . decimal . Tan ( ) , vars : tan + leftParen + d . vars + rightParen , formula : tan + leftParen + d . formula + rightParen , } }
Tan returns the tangent of the radian argument x.
Tan returns the tangent of the radian argument x .