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For z = 1 + i, find arg(z):

Aπ/2
Bπ/4
C0
Dπ
Answer & Solution
Correct answer: B. π/4
z = 1 + i corresponds to (1, 1) in Argand plane, in first quadrant. tan θ = 1/1 = 1, so θ = π/4 (45 degrees).
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