The graph below is one complete cycle of the graph of an equation containing a trigonometric function. Find an equation to match the graph. If you are using a graphing calculator, graph your equation to verify that it is correct. 
Definitions:
Closing Entries
Entries recorded at the close of an accounting period to move balances from temporary to permanent accounts.
Adjusted Trial Balance
A list of all accounts and their balances after adjusting entries are made, used to prepare financial statements and ensure the ledger accounts are balanced.
Current Assets
Assets that a company expects to convert to cash or use up within one year or the operating cycle, whichever is longer.
Property, Plant, and Equipment
Long-term or relatively permanent tangible assets such as equipment, machinery, and buildings that are used in normal business operations.
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