Hello here's the problem: Each of the two sides of a triangle are increasing at the rate of 1/2 foot per second, and the included angle is decreasing 2 degrees per second. Find the rate of change of the area when the sides and included angle are respectively 5ft., 8ft., and 60 deg. Here is my question: How do I find the height of the triangle? Say my base is 5ft. How do I express it in terms of the given details in the problem?