Question

Use the given information to evaluate cos(α-β).

Answer 1

@Rizags

Answer 2

you need some numbers
you need
\[\cos(\alpha)\] and \[\sin(\alpha)\] to start

Answer 3

the picture shows the equation

Answer 4

@satellite73

Answer 5

i'm not sure what to do

Answer 6

did you find the two numbers i asked about?

Answer 7

How do I find those out?

Answer 8

what is the hypotenuse of that triangle? the triangle with \(\tan(\alpha)=\frac{4}{3}\) ?

Answer 9

i honestly have no idea. can you show me?

Answer 10

you can use pythagors, but what is the most famousest mother of all right triangles?

Answer 11

hint solve
\[3^2+4^2=h^2\] if you don't remember it

Answer 12

h=5

Answer 13

right

Answer 14

now you need
\[\cos(\alpha)\] and \[\sin(\alpha)\] remember you are in quadrant three both sine and cosine are negative

Answer 15

i don't know how to find them

Answer 16

do you know the regular old trig ratios?

Answer 17

like "opposite over hypotenuse" and "adjacent over hypotenuse' and"opposite over adjacent" etc?

Answer 18

no sorry

Answer 19

@satellite73