Pls i need this

which equation could be used to find the value of x? cos 49° = cos 49° = sin 49° = sin 49° =

cos 49° = x over 55

Step-by-step explanation:

The complete question is

Which equation could be used to find the value of x?

Triangle DEF where angle E is a right angle. DE measures x. DF measures 55. Angle D measures 49 degrees.

cos 49° = x over 55

cos 49° = 55 over x

sin 49° = x over 55

sin 49° = 55 over x

see the attached figure to better understand the problem

we know that

In the right triangle DEF

The cosine of angle of 49 degrees is equal to divide the adjacent side to the angle of 49 degrees (ED) by the hypotenuse (FD)

so

substitute the given values

therefore

cos 49° = x over 55

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150