Networks Analysis and Synthesis - Engineering

Q1:

If operator 'a' = 1 ∠120° then (1 - a2) =

A 1 ∠ - 30°

B 1 ∠ 30°

C 1 ∠ - 60°

D 1 ∠60°

ANS:A - 1 ∠ - 30°

1 + a2 = - a = 1∠-60°.