I get to this:
*Note*
m = constant
W = Variable
In case you need the actual problem in order to get the derivative here it is:
Quote:
1. An Object with weight W is dragged along a horizontal plane by a force acting along a roope attached to the object. If the rope makes an angle T with a plane, then the magnitude of the force is:
Where m is a constant called the coefficient of friction. For what value of T is F smallest?
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I've tried to get the derivative but the equation gets messy and I can't solve for 0 to get the critical numbers I need. Please help with the derivative.