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3sin inverse=sin inverse(3x-4x cube) |
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Answer» I think the question is To prove 3arcsinx = arcsin(3x-4x^3) Let x= sin A , then A = arcsinx so LHS = 3A and RHS = arcsin (3sinA-4sin^3A) = arcsin(sin3A)=3A So LHS = RHS |
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