Answer:
10,000,000
Step-by-step explanation:
Answer:
ok i did one of these before it was the 2nd or 3rd one
Answer:
18
Step-by-step explanation:
3 x 3 = 9
9 x 2 = 18
Answer:
yes
Step-by-step explanation:
Cos(2x) = cos^2(x) - sin^2(x) - cos(x)
but sin^2(x) = 1 - cos^2(x)
cos(2x) - cos(x) = cos^2(x) - (1 - cos^2(x) ) - cos(x)
cos(2x) - cos(x) = cos^2(x) - 1 + cos^2(x) - cos(x)
cos(2x) - cos(x) = 2cos^2(x) - 1 - cos(x)
cos(2x) - cos(x) = (2cos(x) + 1)(cos(x) - 1)
I think this is what you have asked for.
