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The radius of the circle, the period of revolution, initial position and direction of revolution are indicated in the figure.

    

The y-projection of the radius vector of rotating particle P will be:
1. y(t)=3cos(Ï€t2), where y in m
2. y(t)=−3cos2Ï€t , where y in m
3. y(t)=4sin(Ï€t2), where y in m
4. y(t)=3cos(3Ï€t2),  where y in m

Subtopic:  Phasor Diagram |
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From NCERT
NEET - 2019
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