Physics(Help!!!!!!)

A stick of length l = 65.0 cm rests against a wall. The coefficient of static friction between stick and the wall and between the stick and the floor are equal. The stick will slip off the wall if placed at an angle greater than θ = 39.0 degrees. What is the coefficient of static friction, μs, between the stick and the wall and floor?

μs=

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  1. tan (theta)= (2*u_s)/(1-u_s^2)

    ,solve for u_s

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