Find the value of a negative angle that is equal to each of the following angles.

$18^\circ$
$173.7^\circ$
$\frac{3 \pi}{4}$
$2 \frac{1}{2} \pi$

Question

Find the value of a negative angle that is equal to each of the following angles. $18^\circ$ $173.7^\circ$ $\frac{3 \pi}{4}$ $2 \frac{1}{2} \pi$

Accepted Answer

(i) $ -342^{\circ}$ (ii) $ -\frac{5}{4} \pi $ (iii) $ -186.3^{\circ}$ (iv) $ -\frac{3}{2} \pi$

Trigonometry - Exact Trigonometric Values and the Unit Circle