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# Analytic Trigonometry | IntMath forum

- Re: 3-D Earth Geometry [Solved!]

Sooty I'm really sorry - your question got buried in my crazy inbox and I only...**Murray**13 Sep 2019, 04:48 - Factoring trig equations [Solved!]

In solving "`4\ sin^3x + 2\ sin^2 x - 2 sin x - 1 =...**phinah**15 Jul 2018, 04:44 - inverse functions [Solved!]

I have the problem sec(arccos 5) and I understand that sec is the reciprocal of...**ShayT**02 Feb 2017, 07:30 - Show (1-sinx)/(1+sinx)= (tanx-secx)^2 [Solved!]

How to show `(1-sinx)/(1+sinx)= (tanx-secx)^2`?**Alexandra**03 Jan 2016, 05:45 - Prove the trig identity cosx/(secx+tanx)= 1-sinx [Solved!]

Prove the trig identity cosx/(secx+tanx)= 1-sinx**Alexandra**29 Dec 2015, 06:45 - Re: Trig identity (sinx+cosx)^2tanx = tanx+2sin^2x [Solved!]

It's correct so far, but I don't think it helped. Expand out the bracket on the...**Murray**27 Dec 2015, 12:13 - Re: Trigonometric word problem [Solved!]

Rapelang seems to have disappeared. Would anyone else like to have a go at solving...**Murray**16 Jan 2016, 09:32 - Does sin x + cos x = 1? [Solved!]

does it mean that sin^2 x+cos^2 x=1 is the same as sin x+cos x=1?**Rapelang**10 Dec 2015, 03:32 - Great website! [Solved!]

This website is very useful. Thank you very much.**Emanuel**28 Nov 2015, 05:49 - Graphing a Fish Population Word Problem [Solved!]

a small lake on the island contains twoo species of fish: hake and redfish. the...**Stephanie**26 Nov 2015, 09:30 - Prove trig identity 2cos^2x-1=cos^4x-sin^4x [Solved!]

Comments: Please could you help with this problem? 2cosĀ²x-1=cos^4x-sin^4x**Alexandra**25 Nov 2015, 09:54 - Hyperbolic functions [Solved!]

Hi, I have this problem to solve: 1 + (e2A-e-2A/2) + (e2A+e-2A/2) ---------------------------------- 1 - (e2A-e-2A/2) - (e2A+e-2A/2) The (2A)...**Matt**25 Nov 2015, 09:42 - Trigonometry equation [Solved!]

can you help with following equation simplify 1+sinh2A+cosh2A / 1-sinh2A-cosh2A**Lee**25 Nov 2015, 09:38