A spacecraft is due to make a close pass of an object in space and Scientists would like to investigate the object more carefully using a telescope on-board the spacecraft. For simplicity, let us reduce the problem to two dimensions and assume that the position of the space craft is stationary in (0,0) and the shape of the object is a disk and its boundary has the equation
x^2 +y^2 −10x−8y+40=0
Find the exact values of maximum and minimum of tan φ where φ is the elevation angle of the telescope with respect to the “horizontal” direction (x-axis) during investigation from one edge to the other edge.