Look at the trigonometry table for special angles.
From here, substitute the values in:

Simplify:

Rationalize:

And this is your answer.
Answer:
12(1+3)
Step-by-step explanation:
gcf: 12
12/12=1
36/12=3
subtract the 26 1/2 from 76 and then divide by 2
76-26 1/2 = 49 1/2 / 2 = 24 3/4
B. Obviously all the numbers have to do with one and it’s 30. If it’s wrong let me know !