Question:
The number of values of $\alpha$ in $[0,2 \pi]$ for which $2 \sin ^{3} \alpha-7 \sin ^{2} \alpha+7 \sin \alpha=2$, is:
Correct Option: 3
JEE Main Previous Year Online April 9, 2014
Solution:
The number of values of $\alpha$ in $[0,2 \pi]$ for which $2 \sin ^{3} \alpha-7 \sin ^{2} \alpha+7 \sin \alpha=2$, is:
Correct Option: 3