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Quandaries & Queries
Q & Q
 Topic: trigonometry identity
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5 items are filed under this topic.

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 A trig identity 2006-12-28 From Courteny:Prove that 1 - cos 2x + sin 2x (divided by) 1 + cos 2x + sin 2x = tan xAnswered by Penny Nom. A trig identity 2003-05-20 From Patty:Please help with the following 1/ tanx + cotx = sinxcosxAnswered by Penny Nom. A trig identity 2003-02-22 From Ron:We have spent hours trying to solve the following identity without success. Can you give us some hints as to how it is done? 1 + tan(x) tan(2x) = tan(2x) cot(x) -1Answered by Penny Nom. An identity(?) 2002-05-02 From A student:prove identity sin 2x/1-sinx= secx+1/secxAnswered by Paul Betts. A trig identity 2001-07-27 From Jeff:prove this identity and show steps tan(x/2+pi/4)=secx+tanxAnswered by Harley Weston.

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