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