Ok My mom died and im not feling Ok Right now

deepest sympathy to u and ur family

this isnt a school problem but just try to feel better and find things that make you happy to take your mind off it.

The functions are the inverses of tangent, sine, and cosine, also called arctan, arcsin, and arccos.

For an angle θ that is not the right angle of the triangle (I’m only talking about first quadrant)

arctan of a number, which is like arctan(1), will tell you the angle θ in which tan θ = 1, which in this case is π/4

arcsin of a number will tell you the angle θ in which sin θ= that number, like arcsin(1/2)= π/6 because sin(π/6)=1/2

arccos of a number will tell you the angle θ that the cos θ=that number, like arccos(1/2)= π/3 because cos(π/3)=1/2

So in general, for angle θ that is not the right angle of the triangle,
arctan(opposite/adjacent)=θ
arcsin(opposite/hypotenuse)=θ
arccos(adjacent/hypotenuse)=θ