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OpenStudy (anonymous):
ct= (3sin9t,8cos9t) t= pi/4 what is the speeed of the particle at t time ..? need help
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OpenStudy (anonymous):
c is displacement?
OpenStudy (anonymous):
then v = ( 27cos(9t) , -72sin(9t) )
OpenStudy (anonymous):
then sub in the value pi/4 , then take the length of that vector
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