Question

What is cos A?


(Points : 1)
Option A: 3/4

Option B: 4/3

Option C: 3/5

Option D: 4/5

Answer 1

Lemme show ya.

To find cosine, we'd better keep in mind that: Cosine = Adjacent side / Hypotenuse.

Let's take a look at this little beauty of a triangle, shall-ee?

The side adjacent Angle A is 3. And in this right triangle, we know that the hypotenuse is 5 cm, because it's the longest side. So let's plug in what we know.

While: Cosine = Adjacent side / Hypotenuse,

Then: Cosine of A: (3 / 5).

So we get somethin' that looks like this:

cos A = 3/5.

That looks like Option C to me!

Good luck! Rock on!