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March 30, 2015

March 30, 2015

Posted by **Sally** on Tuesday, December 14, 2010 at 7:57pm.

A particle is moving around the unit circle (the circle of radius 1 centered at the origin). At the point (.6, .8) the particle has horizontal velocity dx/dt = 3. what is its vertical velocity dy /dt at that point?

- AP Calculus -
**Damon**, Tuesday, December 14, 2010 at 8:17pmThis is a 3,4,5 right triangle.

the sin of the angle between horizontal and the resultant tangent at (.6,.8) is dy/dt/3 = -3/5

so dy/dt = -9/5

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