Consider (cosine (startfraction pi over 2 endfraction) = i sine (startfraction pi over 2 endfraction) ) and z = 3 (cosine (startfraction 3 pi over 2 endfraction) = i sine (startfraction 3 pi over 2 endfraction) ).. what is w z expressed in polar form? cos(0) sin(0) cosine (startfraction pi over 2 endfraction) i sine (startfraction pi over 2 endfraction) cosine (pi) i sine (pi) cosine (startfraction 3 pi over 2 endfraction) i sine (startfraction 3 pi over 2 endfraction)