Find the general solution of sin (3x) + sin (x) = 0. The textbook says the answer is (pi*n)/2 but I can’t seem to get it. Please help?

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- June 4th 2009, 10:00 PMxwrathbringerxGeneral Solutions
Find the general solution of sin (3x) + sin (x) = 0. The textbook says the answer is (pi*n)/2 but I can’t seem to get it. Please help?

- June 4th 2009, 10:58 PMAmer
do you know the formula

so

so sin2x=0 or cosx=0

sin2x=0

- June 4th 2009, 10:59 PMmr fantastic
- June 5th 2009, 07:46 AMxwrathbringerx
hmmmm can x = (pi*n)/(3+(-1)^n)?

- June 5th 2009, 08:15 AMAmer
yeah it can be I think (Thinking)

- June 5th 2009, 05:24 PMmr fantastic