8/10 = 4/5 = 0.8
Step-by-step 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
