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PRADEEP KUMAR Grade:
        If r=a cost i +a sint j+at tan ak,then

find values of |(dr/dt)*(d²r/dt²)|
and(dr/dt)*(d²r/dt²)*(d^3r/dt^3).
6 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

r = acost i +asint j +at(tanak) k..................1


 


dr/dt =ad/dt(cost) i  + ad/dt (sint)j+ (atana)d/dt(t) k


 


dr/dt =-asint +acost +atana k ...................2


 


d2r/dt2 = -acost i+ -asint j + 0 k            ...............3


 


d3r/dt3 = asint i -acost j                       ...............4


 


now use these equations and get ur ans ...


 


 


 

6 years ago
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