How fast is the radian measure of the angle

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A ladder which is 13 feet long leans against a wall. The bottom of the ladder is sliding away from the base of the wall at the rate of 5 feet per second. How fast is the radian measure of the angle between the ladder and the ground changing at the moment when the bottom of the ladder is 12 feet away from the wall?

Reference no: EM13185887

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