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Precalculus Mathematics Homework Help
Proving trig equations using addition formulae
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[QUOTE="Bonus vir quid, post: 4511560, member: 488645"] Okay, so I had a go at getting tan(A+B) on one side but I only ended up going in circles again. Perhaps it would help if I showed you how I got lost. First I moved 1+tan(A+B)tanA over to get tan(A+B) - tanA = tanB + tan(A+B)tanAtanB ... This is where I suspect I may be going wrong Then I rearragned to get tan(A+B) - tan(A+B)tanAtanB = tanA + tanB Okay, so this is the part where I start losing it and going in circles Factoring out tan(A+B) I get tan(A+B)(1-tanAtanB) = tan(A+B) ∴ tanAtanB = 2 And I'm certain that's not correct. Perhaps this makes it easier for you to spot wher I've gone wrong. Thanks again [B]EDIT: I've managed to crack it, I just forgot to implement the formula - silly me! Thank you so much for pointing me in the right direction though :).[/B] [/QUOTE]
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Precalculus Mathematics Homework Help
Proving trig equations using addition formulae
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