A uniform board is leaning against a wall. The board has an angle theta with respect to tge horizontal. If the coefficient of friction between the ground and the board and the wall and the board is 0.650, what is the minimum value of theta such that the board can rest between the two surfaces? I produced a diagram, and concluded that the net torque about the bottom of the board is 0. The torque forces I included were the torque from the centre of gravity, the torque from the wall, and the torque induced by friction on the wall. I went through and ended up with a trigonometric equation in two variables, theta and mass, that I could not cancel. I am not even going to bother to show my work because my logic must be wrong. Any suggestions?