Question: ABC is a right triangle with right angle C; the length of the side AC(the base) is 10 inches. The length of the side BC

ABC is a right triangle with right angle C; the length of the side AC(the base) is 10 inches. The length of the side BC is increasing at a rate of 15insec; and hence the acute angle A is changing. At what rate is the angle A changing when the length of BC is 12 inches?

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