Hàm số nào là hàm lẻ
A sin^2 x+1 B cot^3x C tn3x cotx d cosx

If your trying to find the hypotenuse, which is the diagonal side that connects the angle

You would use Pythagorean theorem:

5x5+12x12=c
5x5=25
12x12=144
Now, 25+144=169
Now find the square root of 169 which is 13 which isn't an answer choice, which means your prolly after a leg.

I assume 12 is the hypotenuse

A(squared)+5x5=12x12
A+25=144
144-25=119
Square root of 119=10.9

So I'm going to go with answer 10 in

Hope that helps!