The answers are A. and B.
Step-by-step explanation: I just took the test and it was right ; )
Answer: SECOND OPTION
Step-by-step explanation:
Substitute any value of <em>n</em> shown in the table attached into each function given in the options, and observe if you obtain the value of
shown in the table.
Let's substitute n=1 (According to the table, you need to obtain
):
<u>For the first option:</u>

<u>For the second option:</u>
THIS IS THE FUNCTION
<u>For the third option:</u>

<u>For the fourth option:</u>

Therefore, the answer is the second option.
For this case we have the following trigonometric relationship:
cos (y) = 8/13
Clearing the value of and we have:
y = Acos (8/13)
Calculating the angle we have:
y = 52.02012756 degrees
Rounding off we have:
y = 52.02 degrees
Answer:
the measure of angle and is:
y = 52.02 degrees