# Precalculus: Trigonometric Functions

### Problems

Problem : Which trigonometric function is equivalent to this expression: sin( - x) ?

Problem : What are the amplitude and period of y = - 3 sin(2x + 1) ?

Problem : What are the amplitude and period of y = cos( x) ?

Problem : Which of the trigonometric functions are even, which are odd, and which are neither?

Problem : What are the period and amplitude of the function below?

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