Help with this please :(​

I don't like the ones where we have to approximate, but you did say please.

That's a right triangle, relative to x we're give the opposite leg 6.1, and the adjacent leg 5.1, so

tan x = opposite/adjacent = 6.1/5.1

x = arctan (6.1/5.1)

x ≈ 50.1°

50.1

We leave out the degree sign because it's not part of x -- it's written separately at L.