Theory of Intelligence
11TH•Mathematics•Trigonometric Identities•Question 2

(xii)

Prove the following identities:

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(xii)

sin⁡3θcos⁡θ+cos⁡3θsin⁡θ=2cot⁡2θ\dfrac{\sin 3\theta}{\cos\theta} + \dfrac{\cos 3\theta}{\sin\theta} = 2\cot 2\theta

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