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agent0smithBest ResponseYou've already chosen the best response.1
Well, you can start by testing a couple of values, to disprove it immediately try A=30 and B=59 Tan30 + tan59 = tan89 ?
 8 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
I for one, do not recall the tangent identity to be quite as simple as tan(A) + tan(B) = tan(A + B)...
 8 months ago

agent0smithBest ResponseYou've already chosen the best response.1
It's not @terenzreignz, but the question states for A+B< 90 which makes it not able to be an identity. But it's easy to disprove.
 8 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
Why not tan(45) + tan(30) = tan(75) :)
 8 months ago

pgpilot326Best ResponseYou've already chosen the best response.0
tan 45 = 1. tan 22.5 <> .5
 8 months ago

agent0smithBest ResponseYou've already chosen the best response.1
^that also disproves it, @highschoolmom2010
 8 months ago

katherine.okBest ResponseYou've already chosen the best response.0
basically tana+tanb= (sinacosb+sinbcosa)/cosacosb= sin(a+b)/cosacosb
 8 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
At least we have exact values for these stuff :3 \[\Large \tan(45^o) = 1\\\Large \tan(30^o)=\frac1{\sqrt{3}}\]
 8 months ago

agent0smithBest ResponseYou've already chosen the best response.1
My reasoning for picking a A+B close to 90, was due to tan90 being undefined, so it's highly unlikely two smaller angles will give anything close to the tangent of an angle near 90
 8 months ago

katherine.okBest ResponseYou've already chosen the best response.0
=(sinacosb+cosasinb)/cosacosb=/= sinasinb/cosacosb
 8 months ago

katherine.okBest ResponseYou've already chosen the best response.0
Now i need to somehow prove sinacosb+sinbcosa=/=sinasinb...
 8 months ago

agent0smithBest ResponseYou've already chosen the best response.1
@katherine.ok based on her other questions, I don't think she's at the level of trigonometry where they're using proofs. I think it's more an analytical question.
 8 months ago

pgpilot326Best ResponseYou've already chosen the best response.0
tan 60 + tan (30) <> tan 30
 8 months ago

katherine.okBest ResponseYou've already chosen the best response.0
I think as simple as this sound...
 8 months ago

katherine.okBest ResponseYou've already chosen the best response.0
by using the tangent graph, adding a random point where x is (0,90),you will not get tan a+ tan b because it is not linear graph.
 8 months ago

highschoolmom2010Best ResponseYou've already chosen the best response.0
im lost on all of this tbh....
 8 months ago
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