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highschoolmom2010 Group TitleBest ResponseYou've already chosen the best response.0
 11 months ago

agent0smith Group TitleBest 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 ?
 11 months ago

terenzreignz Group TitleBest 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)...
 11 months ago

agent0smith Group TitleBest 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.
 11 months ago

terenzreignz Group TitleBest ResponseYou've already chosen the best response.1
Why not tan(45) + tan(30) = tan(75) :)
 11 months ago

pgpilot326 Group TitleBest ResponseYou've already chosen the best response.0
tan 45 = 1. tan 22.5 <> .5
 11 months ago

agent0smith Group TitleBest ResponseYou've already chosen the best response.1
^that also disproves it, @highschoolmom2010
 11 months ago

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

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

agent0smith Group TitleBest 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
 11 months ago

katherine.ok Group TitleBest ResponseYou've already chosen the best response.0
=(sinacosb+cosasinb)/cosacosb=/= sinasinb/cosacosb
 11 months ago

terenzreignz Group TitleBest ResponseYou've already chosen the best response.1
Noted :)
 11 months ago

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

agent0smith Group TitleBest 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.
 11 months ago

pgpilot326 Group TitleBest ResponseYou've already chosen the best response.0
tan 60 + tan (30) <> tan 30
 11 months ago

katherine.ok Group TitleBest ResponseYou've already chosen the best response.0
I think as simple as this sound...
 11 months ago

katherine.ok Group TitleBest 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.
 11 months ago

agent0smith Group TitleBest ResponseYou've already chosen the best response.1
^ good point.
 11 months ago

highschoolmom2010 Group TitleBest ResponseYou've already chosen the best response.0
im lost on all of this tbh....
 11 months ago
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