Answer:
The answer is 8/9x + 2484/7
The answer should be A. 9 .
Step-by-step explanation:
6x+3y=54
- 2x+y=18
I'm going to be using the elimination method cause it seems easiest here. so for the elimination method u choose a variable to eliminate I chose y u could do x too if u want to. so first step would be to multiply the second equation by 3. 6x+3y=54
so now u just have to eliminate
6x+3y=54
- 6x+3y=54
because these cancel out the answer would be an infinite solution
You can't simplify this problem any further because there are no more like terms
Refer to the attached file.
Just replace cos2x with cos²x-sin²x
and work out.
I hope it helps u