Question

What is the value of cos(A) in the diagram?
Select one
40/9
9/40
9/41
40/41

Answer 1

Answer:

The answer is option 3.

Step-by-step explanation:

Given that the formula for Cosine Rule is cosθ = adjacent/hypotenuse. So you have to substitute the following values into the formula :

$\cos(θ) = \frac{adj.}{hypo.}$

Let θ = A,

Let adj. = 9,

Let hypo. = 41,

$\cos(A) = \frac{9}{41}$