91Ó°ÊÓ

Plot each point given in polar coordinates.

$\left(2,\frac{3\mathrm{Ï€}}{4}\right)$

The distance $d$from $P_1=\left(x_1,y_1\right)$to $P_2=\left(x_2,y_2\right)$ is $d$ = _______ .

A ______ is a quantity that has both magnitude and direction.

In Problems 1–3, plot each point given in polar coordinates, and find its rectangular coordinates:

$\left(3,\frac{\mathrm{Ï€}}{6}\right)$

Find the real solutions, if any, of the equation$e^{x^2-9}=1$

True or False

If uand v are parallel vectors, then

$\mathbf{u}×\mathbf{v}=\mathbf{0}$

If the rectangular coordinates of a point are $\left(4,-6\right),$the point symmetric to it with respect to the origin is ______.

Plot the point whose rectangular coordinates are $(3,-1)$.

What quadrant does the point lie in?

The conjugate of$-4-3i$ is .

In a triangle with sides a, b, c and angles A, B, C, the Law of Cosines states that ____.