Answer:
r = -8sin(theta)
Step-by-step explanation:
used desmos
Graph D, because no x-value repeats and it passes the vertical line test.
From the identity,
sin^2(x)+cos^2(x)=1
then
cos(x)=sqrt(1-sin^2(x))
where sin(x) is given as 0.42.
Note that the above answer applies to 0<x<90 degrees
