Question

What is the length of ? Round to the nearest tenth.

Answer 1

Using basic trigonometry we can write an equation in COS.

Taking 75° as the angle, its adjacent side is given and we need to find hypotenuse (x). Hence, we use cosine.

We know $cos x=\frac{adjacent}{hypotenuse}$, so we can write,

$cos 75 = \frac{10}{x} \\x=\frac{10}{cos 75} \\x=\frac{10}{0.2588} \\x=38.64$

The length of x, rounded to one decimal place, is 38.6 meters. Fourth choice is correct.

ANSWER: 38.6 m

Answer 2

Answer:

D.

Explanation: