3 years ago

Please help............

Mathematics

1 answer:

Alex17521 [72]3 years ago

5 0

Answer:

x = 8.4

Step-by-step explanation:

In a right triangle, an angle, the length of its adjacent side and the length of the hypotenuse can be related by the cosine.

In this question:

Angle of 40º.

Adjacent side of x, hypotenuse of 11. So

$\cos{40} = \frac{x}{11}$

Using a calculator, we have that $\cos{40} = 0.766$ . So

$x = 11*0.766 = 8.4$

The answer is x = 8.4

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