Question

Represent the following complex number in trigonometric form:
$\cos {12}^{\circ }-i\sin {12}^{\circ }$

Answer 1

$\cos {12}^{\circ }$$-i\sin {12}^{\circ }$

$r=1$

$\theta =\frac{12\pi }{180}=-\pi /15$

$⟹e^{-i\pi /15}$