If the inital side of http://webwork.math.wvu.edu/webwork2...631e7925d1.png is along the positive x-axis and the terminal side includes the point P given below, find http://webwork.math.wvu.edu/webwork2...631e7925d1.png in radians:

(a) http://webwork.math.wvu.edu/webwork2...23f3e9a7c1.png, =?

(b) http://webwork.math.wvu.edu/webwork2...d3331a5211.png, http://webwork.math.wvu.edu/webwork2...c0a1902111.png ?

(c) http://webwork.math.wvu.edu/webwork2...b45f609891.png, http://webwork.math.wvu.edu/webwork2...c0a1902111.png?

(d) http://webwork.math.wvu.edu/webwork2...61cc879421.png, http://webwork.math.wvu.edu/webwork2...c0a1902111.png?

(e) http://webwork.math.wvu.edu/webwork2...1c1e96f6a1.png, http://webwork.math.wvu.edu/webwork2...c0a1902111.png ?

(f) http://webwork.math.wvu.edu/webwork2...23b109cb71.png, http://webwork.math.wvu.edu/webwork2...c0a1902111.png?