hi ,im struggling with this question,all help greatly appreciated this is the proof question .. sin(A+B) / sin(A-B) = (tanA + tanB) / (tanA - tanB )
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Hello mike--1988 Originally Posted by mike--1988 hi ,im struggling with this question,all help greatly appreciated this is the proof question .. sin(A+B) / sin(A-B) = (tanA + tanB) / (tanA - tanB ) Divide top and bottom by : Grandad
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