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in JEE by (15 points)
edited by

find interval of x for which following relations holds:

(a) 2sin-1x=sin-1(2x√1-x2)
(b) 3cos-1x=cos-1(4x3-3x)
(c) 2tan-1x=tan-1(2x/1-x2)
(d) 3tan-1x=tan-1(3x-x3/1-3x2)

by (518 points)
+1
Your question doesn’t look like a doubt but more like a homework help. Please be specific about your query rather than asking for the complete solution. Such complete solutions are advised when questions are conceptual and benefit the community as a whole which doesn’t look like in this case.

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1 Answer

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by (30.8k points)

(a) 2sin-1x=sin-1(2x√1-x2)

(b) 3cos-1x=cos-1(4x3-3x)

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