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Solve cos(2x+1) + cos(3x+2) + cos(x+1) = 0
- Thread starter Ghans
- Start date
D
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What are your thoughts regarding the assignment?cos(2x+1)+cos(3x+2)+cos(x+1) = 0
how would one go about solving the problem in the subject line?
thank you
Please share your work with us ...even if you know it is wrong.
If you are stuck at the beginning tell us and we'll start with the definitions.
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What are your thoughts regarding the assignment?
Please share your work with us ...even if you know it is wrong.
If you are stuck at the beginning tell us and we'll start with the definitions.
You need to read the rules of this forum. Please read the post titled "Read before Posting" at the following URL:
http://www.freemathhelp.com/for
cos(2x)+cos(3x)+cos(x) = 0
I can do the above problem, but am stumped by the +1, +2 in the original
The problem was actually in a test today and the subject line is the problem to the best of recollection. however, the problem might be slightly wrong as I have written it in the subject line
Last edited:
HallsofIvy
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- Jan 27, 2012
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You were expected to know that cos(a+ b)= cos(a)cos(b)- sin(a)sin(b) so that cos(2x+ 1)= cos(1)cos(2x)- sin(1)sin(2x), cos(3x+ 2)a= cos(2)cos(3x)- sin(2)sin(3x), and cos(x+ 1)= cos(1)cos(x)- sin(1)sin(x).