Answer:
Step-by-step explanation:
By definition the cosine of an angle is the quotient between the side adjacent to the angle and the hypotenuse.
In other words:
In this triangle the length of the side adjacent to the 55 degree angle is x, and the length of the hypotenuse is 20
So:
Now we solve the equation to find the value of x
Finally
Answer:
its a
Step-by-step explanation: