Question

Convert x =
(3pi)/4 to rectangular form.

Answer 1

you sure it is "x" ? and its not \(\theta\) ?

Answer 2

oops yes its theta

Answer 3

\(\theta = \dfrac{3\pi}{4}\)

like this right ?

Answer 4

yes

Answer 5

use below :

\(\tan \theta = \dfrac{y}{x}\)

Answer 6

\(\tan (\frac{3\pi}{4}) = \dfrac{y}{x}\)

Answer 7

\(-1 = \dfrac{y}{x}\)

\(y = -x\)

Answer 8

oh ok
how did you get -1?

Answer 9

\(\tan (\frac{3\pi}{4}) = \tan ( \pi - \frac{\pi}{4}) = -\tan(\frac{\pi}{4}) = -1\)