Answer:
x = 9
Step-by-step 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) = [tex]\frac{Adjacent}{Hypotenuse}[/tex].
Plug the values
Theta = 39 degree.
Cos(39) = [tex]\frac{7}{x}[/tex].
x = [tex]\frac{0.777}{7}[/tex].
x = 9.09
Nearest tenth is 9.09
Therefore, x = 9
