For each pair of polar coordinates, (a) plot the point, (b) give two other pairs of polar coordinates for the point, and (c) give the rectangular coordinates for the point. See Examples 1 and 2. 1. a4, 3p 2b

12.8 F(x,y)= 7sin(x)+2sin(y) 0= Fgrad=0 cosx =o & cosy=0 X=pi/2,3pi/2 y=pi/2,3pi/2 (pi/2,pi/2) (pi/2,3pi/2) (3pi/2,pi/2) (3pi/2,3pi/2) 9 5 -5 -9 D=fxxfyy-(fxy)^2 =(-7sinx)(-2siny)-0^2 =-14 at (pi/2,3pi/2)& (3pi/2,pi/2) <0 therefore saddle points Arc Length,...