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Math Help - Trig equation

  1. #1
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    Trig equation

    Please can you help?
    sin(x+45) + sin(s-45)=sqrt(2)
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  2. #2
    Behold, the power of SARDINES!
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    Quote Originally Posted by sad_student View Post
    Please can you help?
    sin(x+45) + sin(s-45)=sqrt(2)
    try using the sum and difference identities for sine

    \sin(x+y)=\sin(x)\cos(y)+\sin(y)\cos(x)


    \sin(x-y)=\sin(x)\cos(y)-\sin(y)\cos(x)

    This gives

     <br />
\sin(x)\cos(45)+\sin(45)\cos(x)+\sin(x)\cos(45)-\sin(45)\cos(x)=\sqrt{2}<br />

    Can you finish from here?

    Good luck
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  3. #3
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    Thanks very much, yes I can do it now
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