how to approach this q (1 Viewer)

ExtremelyBoredUser · Dec 5, 2021

amdspotter said:
View attachment 34427

It's pretty much asking you to express as:

$A\sin(5\theta) + B\sin(3\theta) + C\sin(\theta)$

You're supposed to use the identity;

$z^n - \frac{1}{z^n}= 2i\sin(n\theta)$

and

$(z^n - \frac{1}{z^n})^5 = i(2^5) \times \sin^5(\theta)$

just expand RHS and rest is self explanatory.

how to approach this q (1 Viewer)

amdspotter

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ExtremelyBoredUser

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