Question

Find the value of x to the nearest tenth.

Answer 1

check the picture below

the angle is in degrees, thus, make sure your calculator is in Degree mode

Answer 2

x = 9

Explanation:

Given : A triangle with angle 39 degree.

To find : Find the value of x to the nearest tenth.

Solution : We have given

A triangle with angle 39 degree and hypotenuse = x.

Adjacent side = 7 .

Cos(theta) =
`(Adjacent)/(Hypotenuse)`.

Plug the values

Theta = 39 degree.

Cos(39) =
`(7)/(x)`.

x =
`(0.777)/(7)`.

x = 9.09

Nearest tenth is 9.09

Therefore, x = 9