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# Period of sine and cosine graphs and their equations

## So, how what is the formula for the period?

Practice Problems

problem 1) Based on the graph below, what is the period?

problem 2 Based on the graph below, what is the period?
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problem 3 What is the period of the equation $$y = -2sin(x)$$ ?
problem 4 What is the period of the equation $$y = -7cos(8x)$$ ?
problem 5 What is the period of the equation $$y = 3cos(-2x)$$ ?