cos(3x) = cos(2x+x)
= cos(2x) cos (x) -sin(2x)sin(x)
Hey there!
It can be both. It's a multiple of 8 because 8 times 5 is 40, but it's also a factor of 120 because 80 times 3 is 120.
Hope this helps!
Answer:
hold on might have to ask my teacher
Step-by-step explanation: