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identities
trig identity		 britk1 03/10/07
    Hi,
    I am having some trouble with this identity problem. how do I prove this identity?

    sin(a+b+y)+sin(a-b-y) / cos(a+b+y)-cos(a-b-y)==

    tan b tan y-1 / tan b + tan y


    thanks

Summary of Answers Received Answered On Answered By Average Rating
1. Hi BritK1! In problems such as this, you should immediately...
 03/11/07 IQGuruExcellent or Above Average Answer
2. Use the identities for the sum of sines and the difference o...
 04/02/07 MathMaven53No rating received!
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