My book somehow got from those top two equations in the picture and solved for v'2(t) + v'1(t). I don't see how they did this? Can anyone see the trick for this type of problem?
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asked Mar 17, 2014 at 16:39
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1 Answer
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Multiply the top equation by $\sin{t}$ and the bottom equation by $\cos{t}$. Add.
answered Mar 17, 2014 at 16:50
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$\begingroup$ Oh my gosh! I can't believe I didnt see that... $\endgroup$ Mar 17, 2014 at 16:55