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

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0try the double angle formulas \[\large \sin 2x=2\sin x \cos x\]and\[\large \cos 2x = 2\cos^2 x 1\]

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

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

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0I'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

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