Answer
See plot.
a. $(4,\frac{11\pi}{4})$
b. $(-4,\frac{7\pi}{4})$
c. $(4,-\frac{5\pi}{4})$
Work Step by Step
We can plot the point by moving to angle $\theta=\frac{3\pi}{4}$ counterclockwise, and then to $r=4$ as shown in the figure.
a. We can find another representation for the same point using the given range as $(4,\frac{11\pi}{4})$
b. We can find another representation for the same point using the given range as $(-4,\frac{7\pi}{4})$
c. We can find another representation for the same point using the given range as $(4,-\frac{5\pi}{4})$
