cos270degrees -5cos180degrees

(0/1)-5(-1/1)
0-5(-1)
does it equal -5 or +5?

0 - 5(-1)

0 + 5
5

oh okay thanks! i wanted to put a negative.

To determine the value of cos(270 degrees) - 5cos(180 degrees), we can first simplify the expression.

1. Evaluating cos(270 degrees):
The cosine function at 270 degrees is equal to 0. So, cos(270 degrees) = 0.

2. Evaluating cos(180 degrees):
The cosine function at 180 degrees is equal to -1. So, cos(180 degrees) = -1.

Now we can substitute these values back into the expression:

0 - 5(-1)

Next, we can simplify the expression further:

0 + 5

Since we have a positive number after simplification, the answer is +5.

Therefore, cos(270 degrees) - 5cos(180 degrees) = +5.