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    Solving Rotation Matrices Urgently: cos(pi/4) -sin(pi/4) sin(pi/4) cos(pi/4)

    [URGENT] Rotation Matrices Homework Statement http://e.imagehost.org/0661/Screen_shot_2010-03-09_at_12_37_44_AM.png Homework Equations Rotation Matrix: cos(theta) -sin(theta) sin(theta) cos(theta) The Attempt at a Solution I understand 2a: cos(pi/4) -sin(pi/4) sin(pi/4)...