no it isn't. 2cos(x) is 2 multiplied by cos(x), cos (2x) is cos(2 multiplied by x) meaning 2x is the angle you're taking the cosine of. if you want to know what cos(2x) look up the double angle rule.
It takes Chris 10 minutes to drive, so the latest time he can leave home for work would be 7:50 a.m.
Answer:
the answer is actually 0
Step-by-step explanation:
Hey there! :)
((1 + 3 + 6 + 9)) - 10)
Start in the first set of parenthesis.
(19) - 10)
Simplify!
9
Our answer is 9 - hope I helped! :)
