a1234
  • a1234
Find the solutions of sin5x + sin3x = 0 in the interval [0, 2pi).
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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a1234
  • a1234
I got to 2sin4x cosx = 0 and got the solutions 0, pi, pi/2, and 3pi/2. I feel like some solutions are missing...
tkhunny
  • tkhunny
What did you do to obtain that answer set?
a1234
  • a1234
2sin4x = 0 cosx = 0 2sin4x = 0 equals sin4x = 0

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a1234
  • a1234
@tkhunny
tkhunny
  • tkhunny
?? Where did you get sin(4x)?
a1234
  • a1234
Divided the 2 from both sides...not sure if it would work
tkhunny
  • tkhunny
Try this: \(\sin(5x) = \sin(4x + x) = \sin(4x)\cos(x) + \cos(4x)\sin(x)\) You do this one: \(\sin(3x) = \sin(4x - x) = \)

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