
Using the fact that cos is 2π-periodic, we have

That is,
for any
and integer
.

We get 2 solutions in the interval [0, 2π] for
and
,

You can combine the same numbers with the same variables using the operation sign for each. For example, using your equation, you would combine the 3n and 4n which is 7n. So your equation would be
7n - 2
Answer:
0 (1,2,3,4,5,)and (0,1,2,3,4,5,)
Answer:
D, E, C, A, and B.
Step-by-step explanation:
We wish to solve the equation:

Let’s go through this step-by-step.
1) Distributive Property:

2) Commutative Property of Addition (we rearrange them):

3) Combined Like Terms:

4) Addition Property of Equality* (we add <em>-1</em> to both sides):

5) Multiplication Property of Equality (we multiply both sides by -1):

So, our sequence is:
D, E, C, A, and B.
*A better choice would’ve been the Subtraction Property of Equality, but both are equally fine.