Question

Using the right triangle below, find the cosine of angle A.

Answer 1

8/10 = 4/5 = 0.8

Explanation:

Step 1 :

The given triangle is a right angle triangle with sides as follows :

AB = 10

BC = 6

AC = 8

And angle C is right angle.

Step 2 :

To find the cosine of the required triangle , we have to divide the length of triangle's adjacent side by the triangle's hypotenuse

Here the adjacent side of the given triangle is 8 and the hypotenuse is 10

So the cosine of the required triangle is 8/10 = 0.8