# Trigonometry Pie — Trigonometry

> Trigonometry (iPhone/iPad app by Danh Phan.)

- Source: https://appshunter.io/ios/app/trigonometry-pie/id1493050787 (this page in markdown: same URL + `.md`)
- Developer: [Danh Phan](https://appshunter.io/developer/1493050570)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 10.0 · 18 MB
- Released: 2019-12-30
- Data updated: 2025-08-22
- User reviews in markdown: https://appshunter.io/ios/app/trigonometry-pie/id1493050787/reviews.md

## What is Trigonometry Pie?

Learning trigonometry is as easy and engaging as eating a cake!
- Visually display values: angle, sin, cos
- Illustrating pairs of angles that are especially relevant: opposite, complementary, supplementary, more or less than Pi, Pi / 2, ...
- Switch back and forth between Degrees and Radians at any time without re-run
- Multiple options for displaying sample angles on the circle


## Version history (last 1 release)

### 1.1 — 2019-12-30

No release notes.

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## More apps by Danh Phan

- [Smartify.Vn](https://appshunter.io/ios/app/smartifyvn/id1493050571)

All apps by Danh Phan: https://appshunter.io/developer/1493050570

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2025-08-22.*