# Great website! [Solved!]

**Emanuel** 28 Nov 2015, 05:49

### My question

This website is very useful. Thank you very much.

**Emanuel** 28 Nov 2015, 05:49

This website is very useful. Thank you very much.

X

This website is very useful. Thank you very much.

Relevant page <a href="/analytic-trigonometry/analytic-trigo-intro.php">Analytic Trigonometry</a>

**Newton** 28 Nov 2015, 19:47

Hi Emanuel

Thank you for your feedback - I'm glad that you find the site useful.

Feel free to tell your friends ^^

Good luck with your studies

Regards

X

Hi Emanuel Thank you for your feedback - I'm glad that you find the site useful. Feel free to tell your friends ^^ Good luck with your studies Regards

You need to be logged in to reply.

- 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

- Analytic Trigonometry
- 1. Trigonometric Identities
- 1a. Trigonometric Ratios - Interactive Graph
- 2. Sin, cos, tan of Sum of Two Angles
- 3. Double Angle Formulas
- 4. Half Angle Formulas
- 5. Trigonometric Equations
- 6. Express in the form
*R*sin (θ + α) - 7. Inverse Trigonometric Functions
- Inverse trigonometric function graph animations