The ratio of velocities v1 to v2 long Y-direction just after collision as shown in the diagram below would be
1
\(\frac{sin\theta_1 }{cos\theta_1 }\)
2
\(\frac{sin\theta_1 }{cos\theta_2 }\)
3
\(\frac{sin\theta_2}{sin\theta_1 }\)
4
\(sin\theta_1 sin\theta_2 \)
5
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