Simplify the Expression Algebraically $\sin ( 9 x + 9 y ) \sin ( 9 x - 9 y )$

question 127

Multiple Choice

Simplify the expression algebraically.
$\sin ( 9 x + 9 y ) \sin ( 9 x - 9 y )$

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Definitions:

Cash Equivalents

Short-term, highly liquid investments that can be easily converted into a known amount of cash.

Highly Liquid

An asset or investment that can be quickly converted into cash without much loss in value, ensuring easy accessibility of funds.

Certificates of Deposit

Time deposit financial products provided by banks that offer a fixed interest rate in exchange for keeping a deposit untouched for a predetermined period.

Petty Cash

A small amount of cash on hand used for covering minor expenses, managed through a petty cash fund.