Question

Medal/Fan rewarded please help

Find the cosine ratio of angle Θ. Hint: Use the slash symbol ( / ) to represent the fraction bar, and enter the fraction with no spaces.

Answer 1

Let's begin by stating these trigonometric functions or proportons in other words, but I won't get into detail because trigonometry is quite complex and I am very rusty on the proof and definition stating.

We can define the cosine as the division between the adyacent side, by the hypotenuse, remember, the hypotenuse of a right triangle is the biggest side and is opposite to the right angle.
The adyacent side is the side of a triangle, that is next to it.
The formula is the following, say want to calculate the cosine of a angle "alpha":
\[\cos \alpha =\frac{ ady.side }{ Hyp. }\]
so in a triangle would look like this:

Answer 2

Ok so would I be doing 8/17?

Answer 3

@Owlcoffee

Answer 4

That's correct!

Answer 5

That's the answer?

Answer 6

yes