Question

Co-terminal angles? Am I doing this right?

Answer 1

@Jhannybean

Answer 2

well.. what do you think?

Answer 3

Im like 80% confident

Answer 4

hehe.... ok
so where does the \(\bf -\cfrac{7\pi}{4}\) end up at?

Answer 5

hmmm

Answer 6

Thats like 90 degrees off right?

Answer 7

let us see... 7/4 means 7 quarters of \(\pi\)
so that means 1/4 + 1/4 and so on
in clockwise direction

so..... try it here -> https://www.mathsisfun.com/algebra/trig-interactive-unit-circle.html

click on [Degrees] button at the bottom, so it becomes radians

and then notice where 1/4\(\pi\) is at
then go clockwise -4/4 that be 1 \(\pi\)
and continue 3/4 more clockwise
see where youo end up

Answer 8

\(\bf \textit{keep in mind that }\cfrac{\cancel{ 4}\pi}{\cancel{ 4}}=\pi\)

Answer 9

0?

Answer 10

@SolomonZelman Can you pick up where he was? He is offline.

Answer 11

I just added and subtracted 2pi from pi/4

Answer 12

this is correct

angle theta + 2pi * k is coterminal to theta

Answer 13

where k is any integer

Answer 14

Ok thanks