Tech: Polar Coordinates
-$\left( - 2.8 , \frac { \pi } { 9 } \right)$
A) $( - 2.63 , - 0.96 )$
B) $( - 0.96 , - 2.63 )$
C) $( 2.63,0.96 )$
D) $( 0.96,2.63 )$

Question

Quizplus · Accepted Answer

To convert polar coordinates $(-2.8, \frac{\pi}{9})$ to Cartesian coordinates, use the formulas $x = r \cos(\theta)$ and $y = r \sin(\theta)$. Here, $r = -2.8$ and $\theta = \frac{\pi}{9}$. Calculating gives $x = -2.8 \cos(\frac{\pi}{9}) \approx -2.63$ and $y = -2.8 \sin(\frac{\pi}{9}) \approx -0.96$, which matches choice A.

Tech: Polar Coordinates - (−2.8,π9)\left( - 2.8 , \frac { \pi } { 9 } \right)(−2.8,9π​)

Tech: Polar Coordinates
- $\left( - 2.8 , \frac { \pi } { 9 } \right)$