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Show that tan^-1 (1/2 sin^-1 3/4) = (4 – √7)/ 3 and justify why the other value (4 + √7)/ 3 is ignored.

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Show that tan-1 (1/2 sin-1 3/4) = (4 – √7)/ 3 and justify why the other value (4 + √7)/ 3 is ignored.

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Solving LHS,

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