A crate weighing w pounds sits on a ramp positioned at an angle of x with the horizontal. The forces acting on this crate are modeled by the equation Mwcosx = wsinx, where M is the coefficient of friction. What is an expression for M in terms of x?

A. M = tanx
B. M = cotx
C. M = secx
D. M = cscx

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  1. Hmm. By the time you get to trig, a little algebra I should not throw you.

    M w cosx = w sinx

    M = w sinx / w cosx
    = sinx/cosx
    = tanx

    Where did you get stuck on the way?

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