Let a and b denote two sides of a triangle and let 0 denote the included angle. Suppose that a, b, and vary with time in such a way that the area of the triangle remains constant. At a certain instant a = 2cm, b = 4cm, and e = radians, and at that instant botha and b 6. are increasing at a rate of 2cm/s. Estimate the rate at which O is changing at that instant.

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