3π/4 angle is in the second quadrant, so cos (3π/4) is going to be negative.
Reference angle of 3π/4 is (π - 3π/4) = π/4
cos(π/4) = √2/2
cos (3π/4) = - √2/2
Answer is C.
5x+73 is an expression that cannot be simplified as it is in simplest form.
Hope this helps :)
A stop sign has 8 sides and all angles are the same, so it is a regular octagon.
Answer:
?
Step-by-step explanation:
Well, when any equation has a 0 multiplied into it, the answer will be zero.
Anyway, √25 equals 5
√81 equals 9
9*5 = 45
45 * 0 = 0
I hoped I helped!
