Question

10) Will mark BRAINLIEST + 10 POINTS :)

Answer 1

The answer is A.
(sqrt(6)+sqrt(2))/4

You can solve this using the unit circle, or simply enter cos(pi/12) into your calculator then type those possible answers into your calculator and see which answer equals the same as cos(pi/12).

Answer 2

Answer is A.

√6 + √2
----------
     4