Question

Please help, i need this done asap!

Answer 1

Answer:

$}\frac{\sqrt{2} }{2}$ or 0.707

Step-by-step explanation:

cos(315) is equivalent to cos ($\frac{7\pi }{4}$)

You can look at the unit circle to find the cos value for this. Keep in mind that cos is the x value of the corresponding coordinate.