Theory of Intelligence
11TH•Mathematics•Trigonometric Identities•Question 3

(i)

Prove the following identities:

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(i)

sin⁡3x−sin⁡xcos⁡x−cos⁡3x=cot⁡2x\dfrac{\sin 3x - \sin x}{\cos x - \cos 3x} = \cot 2x

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(ii)
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