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Chapter 6: Q 13. (page 409)

Determine the amplitude and period of each function without graphing.

y=-4cos2x.

Short Answer

Expert verified

Amplitude is 4 and period is蟺.

Step by step solution

01

Step 1. Given Information.

Determine the amplitude and period of each function without graphing.

y=-4cos2x.

02

Step 2. Evaluation.

For 蝇>0, the amplitude and period of y=Asin蝇xare given by

Amplitude =Aand period =T=2蟺蝇.

On comapring, we get

A=-4=4

蝇=2

T=2蟺2=蟺.

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