1.

If \[\sin 2\theta =\cos 3\theta \]and \[\theta \]is an acute angle, then \[\sin \theta \]is equal to [EAMCET 1980]

A. \[\frac{\sqrt{5}-1}{4}\]
B. \[\frac{-\sqrt{5}-1}{4}\]
C. 0
D. None of these
Answer» B. \[\frac{-\sqrt{5}-1}{4}\]


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