Question

For the following triangle, calculate the indicated trigonometric ratio of the given angle.

Answer 1

`cos\text{ 39=}(109)/(140)`

Step-by-step explanation

the cosine of any angle is given by

`\cos\theta=\frac{adjacent\text{ side}}{hypotenuse}`

hence

Step 1

a) let

`\begin{gathered} adjacent\text{ side=109} \\ hypotenuse=140 \\ angle\text{ = 39\degree} \end{gathered}`

replace,

`cos\text{ 39=}(109)/(140)`

I hope this helps you