Question

I am a little confused with this trigonometry question. It says that sin0=O.

I understand that because It says sin it means quadrant 1 and 2.

The possible answers are 0, 90, 180, and 270.
I know 270 is not correct but the others are confusing me.

Angles 0, 90, and 270 lie on the x and y axis. Which quadrants are they a part of.

Answer 1

You can also select multiple answers.

Answer 2

any angle (in any quadrant) has a sine
... it's a defined trig function

using the unit circle (radius = 1)

sin = y/r , cos = x/r , tan = y/x

y = 0 on the x-axis , so the sines of 0º and 180º are zero

Answer 3

Thanks for the help. I think I am starting to understand it a lot better.