Question

If sin0= 12 over 13 and cos0 < 0, what is tan0 ?
Will give medal

Answer 1

sin = ?
opposite hypotenuse adjacent ?

Answer 2

guess that 0 is a \(\theta\) right?

Answer 3

Yes the whole problem didn't post

Answer 4

http://openstudy.com/study#/updates/55447da0e4b0629c5c698484
if you don't know
tutorial

Answer 5

find the third side via pythagoras or from memory
then the tangent is opposite over adjacent, although it is negative in this case

Answer 6

@satellite73 do I add the sides

Answer 7

oh no!

Answer 8

\[a^2+12^2=13^2\\
a^2=13^2-12^2\] solve that for \(a\)

Answer 9

let me know when you get \(a^2=25\) so \(a=5\)

Answer 10

I just did it I got 25 also

Answer 11

tangent is opposite over adjacent
make sure you put a minus sing in front, since you are told cosine is negative

Answer 12

Thanks for the help @satellite73 :)

Answer 13

lol yw

Answer 14

so \[\huge\rm cos \theta <0 \]
it can be in 3rd quadrant ???

Answer 15

remember \(\huge\color{green}{{\rm CAST}}\) rule!