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8-94.

Match each equation with the appropriate graph. Do this without using a graphing calculator.   

Compute without a calculator

Repeating wave curve #1, first visible high & low points: (negative pi eights, comma 1) & (3 pi eighths, comma negative 1), continuing in that pattern, just past 3 pi halves.

Repeating wave curve #2, first visible high & low points: (0, comma 1) & (pi, comma negative 1), continuing in that pattern, just past 5 pi halves.

Repeating wave curve #3, first visible high & low points: (pi halves, comma negative 2) & (3 pi halves, comma negative 4), continuing in that pattern, just past 3 pi.

Repeating wave curve #4, first visible low & high points: (negative pi fourths, comma negative 1) & (pi fourths, comma 1), continuing in that pattern, just past 2 pi.

                                                                Repeating wave curve #5, first visible high & low points: (pi, comma 2) & (3 pi, comma negative 2), continuing in that pattern, just past 5 pi.

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