Modulus & Argument (Edexcel A-Level Further Mathematics): Quizzes

Distance from origin to the point

$|z| = \sqrt{a^2 + b^2}$

$5$

Angle with positive real axis

Radians

$\theta = \tan^{-1}\left(\frac{b}{a}\right)$

Real part of complex number

$z = |z|(\cos \theta + i \sin \theta)$

$\pi - |\theta|$

$\frac{\pi}{4}$ radians