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Trig Pro

Trig Pro
  • #: 165880
  • Price: free ($0.00) In Apple Store
  • Category: Education
  • Updated: 2015-07-02
  • Current Version: 3.2
  • 3.2
  • Size: 0.80 MB
  • Language: English
  • Seller: Larry Feldman
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 3.1.3 or later
  • © 2009 Larry Feldman
  •  Add to Favorite apps



Raise your hand if you think the only solutions to sin(x) = 0.5 are 30 degrees or pi/6 radians. Feel free to use your calculator.

If you raised your hand, promptly use your hand to download this application.

There are actually an infinite number of solutions to most inverse trigonometry problems, but your calculator probably only gives you one. Guess what. Your teacher probably wants you to explain all of the solutions. "Trig Pro" does that.

This unique app also computes the reference angle in degrees or radians for any given angle. Useful in real life for most people? No. Useful for Trig students? Definitely.

"Trig Pro" contains a wealth of solvers and tutorials:

- A unit circle in vivid colors

- Unit circle representations of the six trig functions

- A triangle solver (SSS, SAS, AAS, ASA, SSA)

- A solver for showing attributes and graphical representations of the six trig functions

- Changes in amplitude, period, horizontal shifts and vertical shifts

- An extensive list of formulas and identities

- Degree/Radian converters

- Tutorials on 30-60-90 and 45-45-90 triangles

- Step-by-step examples of solving inverse trig problems

- Step-by-step examples of simplifying trig expressions

- Angles of Elevation and Depression

- Polar curves: Limacons, Rose Curves, and Lemniscates

5 screen shots don't do this application justice. More screen shots at:


I welcome all comments, questions, and suggestions: lfeldman65@gmail.com

Follow me on facebook for app news, tips, and free Math help:


Please check out my other applications:

ACT Math Prep

Algebra Pro

Calculus Pro

Geometry Pro

Math Pro (six Math apps for the price of two!)

Physics Pro

PreCalculus Pro

Probability Pro

SAT Math Prep

Statistics Pro

What's New in Version 3.2

- Updated for iPhones and iPads
- Added links to video lessons by Larry Feldman

iPhone Screenshots

Trig Pro iPhone Screenshot 1
Trig Pro iPhone Screenshot 2
Trig Pro iPhone Screenshot 3
Trig Pro iPhone Screenshot 4
Trig Pro iPhone Screenshot 5

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The information may be outdated (2017-03-08 10:02:38). For actual information go to iTunes

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