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Please solve Q9
If 3 \( sin^2A + 2sin^2B = 1 \) and 3 \(sin2A - 2\) \(sin2B = 0\), where A and B are acute angles, then \(A + 2B\) is equal to
(a) \(\frac {\pi}{3}\)
(b) \(\frac {\pi}{4}\)
(c) \(\frac {\pi}{2}\)
(d) none of these
Updated Thu, 30 May 2019 02:57 pm


In the given ex-1, why do we take log here to find error in radius of earth ? And what is partial differentiation? Please explain it.
Updated Wed, 29 May 2019 11:55 am