FP3 help! Watch

Anonymous59
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Zygroth
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(Original post by Heroesorghosts)
However, the answers also include the arguments as if the lines which form the above arguments were extended. Is this just because the power is 6 in which case there should be 6 answers? Or just common sense to include the corresponding arguments? Thanks!
The answers you have for the 3rd power are in the range \pm\pi; dividing this by 2 gives you the correct answers, but only in the range \pm\frac{\pi}{2}. There's always 6 solutions for a power of 6 and all are equally spaced so it's just a bit of addition to find the other ones :p:
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