Question

tan x° = e divided by 8 and sin x° = e divided by f

Answer 1

Look at the figure:

An image of a right triangle is shown with an angle labeled x.
If tan x° = e divided by 8 and sin x° = e divided by f, what is the value of cos x°?

cos x° = 8 divided by f
cos x° = f divided by 8
cos x° = 8f
cos x° = 8e

Answer 2

tan(x) = opposite/adjacent = e/8
sin(x) = opposite/hypotenuse = e/f

identify your opposite and hypotenuse based these equalities. Then plug them into cos(x) = adjacent/hypotenuse

Alternatively, tan(x) = sin(x)/cos(x) and you could calculate cos this way