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June 25, 2016
Posted by **RJ** on Monday, June 18, 2012 at 1:45pm.

- Math -
**Steve**, Monday, June 18, 2012 at 3:16pmy' = 2sin(.25x^4)*cos(.25x^4)*(x^3)

= x^3 sin(.5x^4)

not sure what your angle is. Solving for x when y=0.17 didn't give me a useful value.