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Which trig ratio should you use to find the given side?

15.5
B
28°
х
Csine
tangent
cosine

Which trig ratio should you use to find the given side? 15.5 B 28° х Csine tangent-example-1

1 Answer

7 votes

Answer:

D. cosine

Explanation:

As it can be seen in the figure, the triangle ABC is a right-angled triangle with Angle C = 90 degree.

In a right angle triangle, there is a formula as following:

cosine (of an acute angle) = length of adjacent side/ length of hypotenuse

In the figure, the point of angle B and length of hypotenuse AB are given.

We have to calculate x - length of the given side. As BC is the adjacent side of angle B

=> we can use the above formula to calculate x

So that we can use cosine

User Jcolino
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