Question

Find the value for the side marked below.

Round your answer to the nearest tenth.
61°
135
y
y = = [?]

Answer 1

`65.4`

Explanation:

In any right triangle, the cosine of an angle is equal to its adjacent side divided by the hypotenuse, or longest side, of the triangle.

Therefore, we have:

`\cos 61^(\circ)=(y)/(135),\\t=135\cos 61^(\circ)=65.4492987333\approx \boxed{65.4}`