Rotate Curve Question

Hello, I'm working on this sine ring that is basically going to be a sweep of 4 sine profiles around a circle.  I've got all the sine curves positioned where i want them, but i need to rotate some of the sine curves so they are perpendicular to the circle edge.  I'm using a rotate axis component with a slider hooked up to it, but when I try to rotate 90 degrees it rotates two far, it seems like the numbers I type in do not correspond with the true rotation, if that makes senses.  Any suggestions?  Maybe a conversion or something I'm missing in the edit tab?  Thanks