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Homework Statement:

I had problem with solving the equation while doing my mechanics homework
How to solve equation : 1226.25cosx  15000sinxcosx + 7500sinx = 0
Relevant Equations:
 sin^2 + cos^2 = 1
I can’t get the angle, answer given is x=56.33 , x=9.545. (All steps before the equation are correct.)