Given that the restriction of the cosine function cos to i : = [0, 1] is strictly decreasing and that cos 0 = 1, cos 7 = -1, let ) : = (-1,1), and let arccos: j r be the function inverse to the restriction of cos to i. show that arccos is differentiable on (-1, 1) and d acrccos y = (-1)/(1-2)2 for ye (-1, 1). show that arccos is not differentiable at -1 and 1.

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

Through non-collinear points there is exactly one plane.

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y > 2x + 3y is less than negative 3 over 2 times x minus 4part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points)part b: is the point (â’4, 6) included in the solution area for the system? justify your answer mathematically. (4 points)