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sin 3theta = 3sin theta - 4sin^(3) theta...

`sin 3theta = 3sin theta - 4sin^(3) theta ` के सम्बन्ध को निम्नवत रूप में परिवर्तित करें-
`3sin^(-1)a=sin^(-1)(3a-4a^(3)), a in [-(1)/(2),(1)/(2)]`

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