Page 91 - Calculus with Complex Numbers
P. 91
Solutions to exam ples
(iv) (13/37) + (4/37)/ .
lf C = cos 0, S = sin 0, then
lf C = cos 30O then
0 = cos 90* = 4CS - 347 = C(4C2 - 3).
Therefore C = 0 or +VV2. What do the other values of C represent?
