Question

Which trigonometric function would be used to find the length of this triangle's hypotenuse?

A. sin 25°
B. cos 25°
C. tan 25°

Answer 1

B. cosine 25 degrees

because cosine = adjacent / hypotenuse

Answer 2

Cos 25° =
`(adjecent)/(hypontnuse)`.

Explanation:

Given : A right angled triangle with angle 25° and side = 12 cm

To find : Which trigonometric function would be used to find the length of this triangle's hypotenuse.

Solution : We have given that adjacent side = 12 cm ,

By the trigonometric ratio

Cos (theta) =
`(adjecent)/(hypontnuse)`.

Therefore, Cos 25° =
`(adjecent)/(hypontnuse)`.

Therefore, Cos 25° =
`(adjecent)/(hypontnuse)`.