Question

Find cos(b)in the triangle
choose 1;
a- 4/5
b- 4/3
c- 3/5
d- 3/4

Answer 1

The answer is C.

Explanation:

In Trigonometric functions, the formula for cosine rule is, cosθ=adj./hypo. so in order to find the value of cosβ, you have to substitue the following values into the formula :

adj. = BC

= 3

hypo. = AB

= 5

cosβ = 3/5