- #51

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@vcsharp2003, check the video by @Steve4Physics at post #45, it has a more clever way of calculating ##\cos a## than using sine law.

P.S it seems that even with the video approach we end up with the same result as at post #21, the only difference is that we don't need the absolute value as I had noted. It is of these strange cases in math where you do two mistakes and you end up with the correct result ,lol.

P.S it seems that even with the video approach we end up with the same result as at post #21, the only difference is that we don't need the absolute value as I had noted. It is of these strange cases in math where you do two mistakes and you end up with the correct result ,lol.

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