# If $$\theta$$ is equal to $$\alpha$$ at the time the box is just about...

Question 586
A
sin$$\alpha$$
B
cos$$\alpha$$
C
tan$$\alpha$$
D
sec$$\alpha$$
E
cot$$\alpha$$
##### Explanation
$$\mu = \frac{F}{R} = \frac{W sin \theta}{W cos q}$$

= tan$$\theta$$

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