Question

How would you express this using only x and y?

cos(arcsin(x)-arctan(y))

Answer 1

maybe mathway.com could help you w/ your question :)

Answer 2

try to use the difference identity

Answer 3

and then you might need some right triangles to simplify further

Answer 4

i got to using the difference identity but not sure how to simplify further

Answer 5

to simplify cos(arcsin(x))
or something similar draw a right triangle
let u=arcsin(x)
so
sin(u)=x