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The sinusoidal function f(x)=42sin(9x−π/10)+42 models the height, in centimeters, that a valve stem of the a tire is above ground x seconds after the tire begins to rotate. How long does it take the valve stem to complete one revolution? Enter your answer, rounded to the nearest hundredth of a second.

 Feb 28, 2020
 #1
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the 9 x   part compresses the sinusoid wave from   2 pi   to    2pi/9 sec  = ~~.70 sec

 Feb 28, 2020

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