Question

if X= cosa-isina, Y=cosb-isinb, Z= cosc-isinc then (X^2 Z^2 -Y^2)/XYZ is (a) 2cos(a-b+c) (b)-2cos(a-b+c) (c)-2isin(a-b+c)

Answer 1

Answer:

Oh my God I will not be able to read this