Problem 4-7

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Problem 4-7

Post  rmross on Mon 31 Oct 2011, 16:10

I've started working on Problem 4-7 and have not been able to obtain the given alternate form of the energy equation. When I divide thru by w^2 in order to get M, the result is as follows:

(gamma-1/gamma+1) + (2/(gamma+1))*(sin mu)^2 = (a*/w)^2

No cosine squared term, and no coefficient for the sine term. Can anyone give me an idea of where I am going wrong here? Thanks.

rmross

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Got it

Post  rmross on Mon 31 Oct 2011, 16:47

Just figured out my error with this part. I needed to further simplify using the cos^2=1-sin^2 trig identity. The result gives the correct answer for the first part of the problem.

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