Answer:
cos c = √2
Step-by-step explanation:
Look at the attached picture.
We know that cos c = base/hypotenuse
The value of base is 5
The value of hypotenuse is 5√2
Now plug the values in the formula:
cos c = base /hypotenuse
cos c = 5/5√2
5 will be cancelled out by 5
Then we have the value √2
cos c = √2 ....
