Question

Please help me on this

Answer 1

Answer:

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

Step-by-step 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,

$Sin\theta = \frac{Perpendicular}{Hypotenuse}$

$Cos\theta = \frac{Base}{Hypotenuse}$

$Tan\theta = \frac{Perpendicular}{Base}$

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

Answer 2

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