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Mathematics · 2014
JEE Main · 9 April 2014, Shift 1 · Q88
The number of values of α in [0,2 π] for which 2 sin^3 α-7 sin^2 α+7 sin α=2, is:
The number of values of $\displaystyle \alpha$ in $\displaystyle [0,2 \pi]$ for which $\displaystyle 2 \sin ^3 \alpha-7 \sin ^2 \alpha+7 \sin \alpha=2$, is :
Official answer
(3)
$\displaystyle 3$
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JEE Main 2014 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.