Hi,

I have a triangle with the points A( 5,-2) B(0,0) and C(4,2) . I have to rotate the triangle so that the line BA sits on the positive x axis. I am stuck, how to work out the values for sin, cos and tan?

I have worked out the lengths of those lines BA = sqroot[29], AC = sqroot[17] and BC = sqroot[20]. After that I have no idea where to start, any help is appreciated.