Theory of Intelligence
11TH•Mathematics•Trigonometric Identities•Question 5

(ii)

Prove that:

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(ii)

sin⁡π9sin⁡2π9sin⁡π3sin⁡4π9=316\sin\dfrac{\pi}{9}\sin\dfrac{2\pi}{9}\sin\dfrac{\pi}{3}\sin\dfrac{4\pi}{9} = \dfrac{3}{16}

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