Question

Use ∆ABC to find the value of cos A.

Answer 1

Using the catchphrase SohCahToa, we can determine that the cosine ratio is equal to the length of the side adjacent to the angle over the length of the hypotenuse of the right triangle.

To find the cos∠A, we will look for side lengths BC and AB.

cosA = $\frac {9}{41}$

Since $\frac {9}{41}$ is already in it's simplest form, we can conclude that the cosine of ∠A is $\frac {9}{41}$.

Hope this helps! :^)

Answer 2

In triangle ABC, using trigonometric ratio, the value of cos(A) is 40/41

What is an equation?

An equation is an expression that shows the relationship between two or more numbers and variables.

Trigonometric ratio is used to show the relationship between the sides and angles of a right angled triangle, hence:

cos(A) = 40/41

In triangle ABC, using trigonometric ratio, the value of cos(A) is 40/41

Find out more on equation at: https://brainly.com/question/2972832

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