12. Each of two sides of a triangle are increasing at the rate of \( 1 / 2 \) foot per second, and the included angle is decreasing \( 2^{\circ} \) per second. Find the rate of change of the area when the sides and included angle are respectively 5 feet, 8 feet, and \( 60^{\circ} \).
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We need to find the rate of change of the area of the triangle when the sides are 5 feet and 8 feet, and the included angle is \( 60^\circ \). Show more…
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