What is exp(ja) equal to, where j is the square root of unity?
A. cos ja + jsin a
B. sin a + jcos a
C. cos j + a sin j
D. cos a + jsin a
Answer:A
What is exp(ja) equal to, where j is the square root of unity?
A. cos ja + jsin a B. sin a + jcos a C. cos j + a sin j D. cos a + jsin a
Explanation: This is the corollary of DeMoivre/Euler’s Theorem.