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Math Help - [SOLVED] Compound Angle Formulas - *I don't know what to call this*

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    [SOLVED] Compound Angle Formulas - *I don't know what to call this*

    I don't even know where to start with this question! I know the Compound formulas, but I do not know how to apply them to this question.

    Question:
    If x and y are in the interval  (0, \frac{\pi}{2}) and sinx =  \frac{3}{5} and cosy =  \frac{12}{13} evaluate each of the following.

    a)  \sin (x + y)

    What I know:
    I know that  sin (a + b) = sina * cosb + cosa * sinb

    Any help is greatly appreciated!


    Edit: This question is solved.
    Last edited by mr fantastic; April 19th 2009 at 09:27 PM. Reason: Deleted question restored.
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