Find principal argument of -1 - i:
A-π/4
B-3π/4
C3π/4
Dπ/4
Answer & Solution
Correct answer: B. -3π/4
-1 - i is at (-1, -1), in third quadrant. Principal argument range (-π, π]: arg = -3π/4 (or equivalently +5π/4, but principal value is in (-π, π]).
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