Answer:
d for sure jsjeieoeoeooeiekekejej answer is not being send because of less typing so .
the answer should be 12. but I'm only 80% sure sooo...
Arctan (√3 /3) = 30°. = π/6 rad
That is the value searched, in degrees and radians.
You can verifiy that tan(30°) = sin(30°) / cos(30°) = [1/2] / [√3/2] = 1/√3 = √3 / 3