A) \[tan\text{ }12{}^\circ \]
B) \[\text{cos }12{}^\circ \]
C) \[\text{sin }12{}^\circ \]
D) None of these
Correct Answer: A
Solution :
Coefficient of static friction \[{{\mu }_{s}}=\tan {{\theta }_{s}}\] \[{{\mu }_{s}}=\tan 12\]
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