Suppose that in a triangle the length of side a is increasing at a rate of 2 m/s, and the length of side [3 is decreasing at a rate of 1 m/s. If the area of the triangle remains constant, at what rate does the angle between side a and side I) change when side a is of length 10 n1, side 13 is . . 7r . . of length 20 m, and the angle between Slde a and b 15 radians? Gwe an exact answer. 6 Suppose that h is a differentiable two variable function. Moreover, suppose that you know that Duh(a,b)=4 and Dvh(a,b)=7 where u= and v=. Find 614mb) exactly