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How can I get rid of the $\displaystyle \sin^{n-1}(x)$, because the question says in terms of $\displaystyle \sin^{n-2}(x)$

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- Apr 19th 2010, 10:47 AMusagi_killerSin reduction formula!
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How can I get rid of the $\displaystyle \sin^{n-1}(x)$, because the question says in terms of $\displaystyle \sin^{n-2}(x)$ - Apr 19th 2010, 12:45 PMOpalg
It doesn't say "in terms of $\displaystyle \sin^{n-2}(x)$", it says "in terms of $\displaystyle I(n-2)$", and that is what you have done. You're allowed to keep the term $\displaystyle -\frac1n\sin^{n-1}(x)\cos(x)$ in the answer, though perhaps the question could have been worded better, to make that clearer.