Question

Please someone help me i'm gonna cry lol

Answer 1

$\sqrt{2}$Answer:

Step-by-step explanation:

now the equations looks like

5-4*Cos(x) = y

when 45° gets plugged into Cos(x) we get $\sqrt{2}$/2 again

5- 4 * ($\sqrt{2}$/2) = y

5-2$\sqrt{2}$=y

leave it in that form . it's exact that way