The data shown here is similar to what I have to solve, but I can't understand the procedure

be the points A(0,709) y B(1.) in polar coordinates, two of the vertices of an equilateral triangle. Determine the Cartesian coordinates of the third vertex (there are two solutions). Problem 1 resources: polar to rectangular: rectangular to polar : * = rcos (@) r= xty y = rsen(0) Note: remember that each internal angle of said triangle is 60 degrees and their sum must be 180 degrees. 2.0 2.- A street vendor sells a hamburgers, b hot dogs and c soft drinks in one day. He charges $2 for a hamburger, $1.50 for a hot dog, and $1 for a proper soda. If A= (a,b.c) and P= ( 2,1.5,1) , what is the meaning of dot product A.P? Problem 2 Resources Definition If a = (a1, d2, a3) yb = (b1, b2, by), : then the dot product between a and b is the number a-b given by ab=ab tab, tab