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| Math Central | Quandaries & Queries |
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Subject: Trigonometry Prove that 1 - cos 2x + sin 2x (divided by) 1 + cos 2x + sin 2x = tan x |
Hi Courtney,
Use the two identities
cos2x = cos2x - sin2x and
sin2x = 2 sinx cosx
Penny
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