Trigonometry
posted by James .
A wheel is rotating at 200 revolutions per minute .find the angular speed in radians per second.
200 rpm
=200*2pi radians/1 minute (1 rotation = 2pi radians)
= 400pi radians/60 seconds
=20/3 radians/second
You can follow the same procedure for the other two questions you asked.

Trigonometry 
jordan
I believe you missed a step and you should double check your answers
:'(
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