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pottersheep
Group Title
Grade 12 Trig Identities trouble....help please...
I'm not sure how to prove that
((sin2x/(1+cos2x)) * (cosx)/(1+cosx) = tan(x/2)
 2 years ago
 2 years ago
pottersheep Group Title
Grade 12 Trig Identities trouble....help please... I'm not sure how to prove that ((sin2x/(1+cos2x)) * (cosx)/(1+cosx) = tan(x/2)
 2 years ago
 2 years ago

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sirm3d Group TitleBest ResponseYou've already chosen the best response.1
try the double angle formulas \[\large \sin 2x=2\sin x \cos x\]and\[\large \cos 2x = 2\cos^2 x 1\]
 2 years ago

pottersheep Group TitleBest ResponseYou've already chosen the best response.0
Yep that's what I have tried out...I keep getting stuck though
 2 years ago

pottersheep Group TitleBest ResponseYou've already chosen the best response.0
because one side is tan(x/2)
 2 years ago

chaguanas Group TitleBest ResponseYou've already chosen the best response.0
I've tried it and find what I think is the answer. See if you can find it; I used this page http://www.sosmath.com/trig/douangl/douangl.html
 2 years ago

pottersheep Group TitleBest ResponseYou've already chosen the best response.0
Thank you very much I will go take a look
 2 years ago
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