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January 30, 2015

January 30, 2015

Posted by **Michael** on Thursday, December 2, 2010 at 10:08pm.

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**bobpursley**, Thursday, December 2, 2010 at 10:16pmlet x be the horizontal distance from wall to ladder.

cosineTheta=x/10

10 cosTheta=x

-10sinTheta dTheta/dt= dx/dt

so you are looking for dTheta/dt

when x=5, theta = arccos.5, or 60 deg, and sin of 50 = .877

dTheta/dt= dx/dt / (10*.877)

check all that.

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