Find the acceleration of \( B \)
P
(1) \( \frac{a \cos \alpha_{1}}{...
Find the acceleration of \( B \)
P
(1) \( \frac{a \cos \alpha_{1}}{\cos \alpha_{2}} \)
(2) \( \frac{a \sin \alpha_{1}}{\cos \alpha_{2}} \)
(3) \( \frac{a \cos \alpha_{2}}{\cos \alpha_{1}} \)
(4) \( \frac{\cos \alpha_{1}}{\cos \alpha_{2}} \)
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