Question

Evaluate tan 30° without using a calculator by using ratios in a reference triangle.

Answer 1

Please help!

Answer 2

Do you know what sin of 30 degrees is?

Answer 3

And, do you know what cos of 30 degrees is?

Answer 4

In radians or degrees?

Answer 5

learn your special triangles first
45, 45, 90
30. 60. 90
60, 30, 90

Answer 6

Ok I do know them

Answer 7

Radians

Answer 8

sin30= -0.9880316241

Answer 9

cos30=0.1542514499

Answer 10

No, exact values. There is no way you got thos values without a calculator. The question said not to use a calculator

Answer 11

Ok no I don't know

Answer 12

Oh wait yes I do

Answer 13

sin30= 1/2

Answer 14

Look at the unit circle

Answer 15

cos30= \[\sqrt{3}/2\]

Answer 16

To find tan, divide sin/ cos

Answer 17

http://staffweb.psdschools.org/kemotich/Mrs_Motichka/Precalculus%20A/Chapter%205/Special%20Right%20Triangles%20and%20the%20Unit%20Circle.pdf
look at this, this will help you learn the unit circle with the special rt triangles.

Answer 18

Ok I got 1/\[\sqrt{3}\]

Answer 19

http://www.youtube.com/watch?v=BnIfvgbC1fo
if you want a video, here is one for you

Answer 20

Is 1/sqrt3 correct?

Answer 21

Is 1/sqrt3 correct?

Answer 22

Thanks for everyone's help!

Answer 23

http://www.google.com/imgres?q=table+of+values+for+special+right+triangles+%2B+unit+circle&hl=en&biw=1536&bih=707&tbm=isch&tbnid=lkNCXOkgaxVXKM:&imgrefurl=http://sites.google.com/site/abwportfolio/trig-unit&docid=OS7mxvX9487I2M&imgurl=http://image.tutorvista.com/content/feed/u72/table1.JPG&w=477&h=529&ei=ofd6UMraFcrVqgHu14CQBQ&zoom=1&iact=hc&vpx=972&vpy=167&dur=1565&hovh=236&hovw=213&tx=87&ty=89&sig=112271993644095618769&page=2&tbnh=150&tbnw=135&start=30&ndsp=36&ved=1t:429,r:36,s:20,i:239
you can check yourself using this table