Question

tanθ (see attachment)

Answer 1

hint:

use the unit circle and the idea that

tan(x) = sin(x)/cos(x)

Answer 2

Can you do this problem with me to see if I can understand the next ones? @jim_thompson5910

Answer 3

do you have the unit circle with you?

Answer 4

Yes

Answer 5

ok what is sin(60)

Answer 6

-0.3048106211

Answer 7

don't use a calculator

Answer 8

use the unit circle

Answer 9

Oh. \[\frac{ \sqrt{3} }{ 2 } \]

Answer 10

good

Answer 11

it's \[\frac{ \sqrt{3} }{ 2 } \]

Answer 12

what is cos(60)

Answer 13

1/2

Answer 14

divide sin(60) by cos(60) to get your answer

Answer 15

\[\sqrt-{3}\]

Answer 16

Well - on the outside

Answer 17

no it's positive, so the answer is actually \[\large \sqrt{3}\]

Answer 18

hopefully you see how it's positive?

Answer 19

Yes, thank you!

Answer 20

How would I find sin of 225?

Answer 21

@jim_thompson5910

Answer 22

225 is also found on the unit circle

Answer 23

do you see it?

Answer 24

Yes. What is the ratio for sin and cos I mean?

Answer 25

don't worry about cos, just focus on sine

Answer 26

I understand how to solve them, I just need the ratios now :)

Answer 27

check out this unit circle and look for the angle 225 degrees

http://www.regentsprep.org/regents/math/algtrig/ATT5/600px-Unit_circle_angles_svg.jpg

Answer 28

I understand all that.. Tan = sin/cos .... What is that ratio for sin and cos? I have other problems to do.

Answer 29

there is no ratio for sine and cosine, oh you mean like

sine = opposite/hypotenuse

and

cosine = adjacent/hypotenuse

Answer 30

Yes, thank you!

Answer 31

ok glad it's clicking

Answer 32

So the sin for 225 would just be - sqrt 2 over 2 right?

Answer 33

good