Question

I have several problems similar to :

find tan theta if (-5,12) is a point on the terminal side of theta

Answer 1

x = -5
y = -12
r = 13

sin θ = y/r = -12/13
cos θ = x/r = -5/13
tan θ = y/x = 12/5

Answer 2

where did the 13 come from?

Answer 3

to find the hypotenuse you take 5^2 + 12^2 and then you will get 169 which is 13^2 so I get that I have all 3 sides

Answer 4

do you needmore help

Answer 5

tan(x) = y

x = tan-1(y)

Answer 6

tan(t) = -12/5

t = tan-1(-12/5)

thats the inverse tan function

Answer 7

what it amounts to i dont know; have to calulator it for an exact theta(t)

Answer 8

good