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agillogly

  • 2 years ago

Find all solutions to the equation sin(3x)cosx-sinx cos(3x)=0 on the interval [0,2pi] a- x=0,pi/4,pi/2,3pi/4,pi,3pi/2,2pi b- x=0,pi/2,pi,3pi/2,2pi c- x=0,pi,2pi d- x=0,pi/2,3pi/2

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  1. dpaInc
    • 2 years ago
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    |dw:1339981024363:dw| i just used the rule from sin(A - B) can you take it from here?

  2. agillogly
    • 2 years ago
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    no :/ Im not sure how to figure out any other solutions.

  3. dpaInc
    • 2 years ago
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    |dw:1339982552110:dw|

  4. dpaInc
    • 2 years ago
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    so you have 4 solutions within [0, 2pi]... but 2pi works also so you actually have 5 solutions...

  5. agillogly
    • 2 years ago
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    Okay, I see how you did that. It makes sense now. Thanks.

  6. dpaInc
    • 2 years ago
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    which did you pick?

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