Question

Please help me on this

Answer 1

The answer is B because the answer is not a because anything/anything=1, and it is obviously not 1°, so it has to be b, unless there are more options, because it should be DF/DE

Answer 2

The value of
`cos\theta` would be Base/Hypotenuse = EF/DF

Explanation:

In figure, we are given a triangle

There is a 90 degree angle in the triangle. Therefore, the triangle is a right triangle.

In a right triangle,

`Sin\theta = (Perpendicular)/(Hypotenuse)`

`Cos\theta = (Base)/(Hypotenuse)`

`Tan\theta = (Perpendicular)/(Base)`

In triangle, the side with right angle and given angle is called base, Therefore

Base = EF

The side opposite to the right angle is called the hypotenuse, so

Hypotenuse = DF

and

Perpendicular = DE

Therefore, the value of
`cos\theta` would be Base/Hypotenuse = EF/DF