The mathematical forms for the three sinusoidal traveling waves are given by 
where x is in meters and t is in seconds.Of these waves:
Definitions:
Self-Employment Income
Self-Employment Income is money earned from carrying out business activities or providing services as an independent contractor, rather than as an employee.
Advance Rental Payments
Prepayments of rent, often required by landlords, accounted for before the period of use or occupancy.
Security Deposits
Funds held by a landlord as a financial protection against damage to property or unpaid rent by a tenant, to be returned at the end of a lease term under certain conditions.
Passive Activities
Economic activities in which the individual does not materially participate, often resulting in income or losses for tax purposes.
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