# Unit circle. Trigonometry

> Interactive graphs of trigonometric functions and the Unit circle

Canonical page: [https://chrome-stats.com/d/com.erkprog.trigonometryvisact](https://chrome-stats.com/d/com.erkprog.trigonometryvisact)

## Overview

- **ID:** `com.erkprog.trigonometryvisact`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Erlan Amanatov
- **Category:** EDUCATION
- **Downloads:** 50,606
- **Rating:** 4.45 / 5 (193 ratings)
- **Version:** 2.1.0
- **Last updated:** 2025-08-27
- **First published:** 2020-04-05
- **Publisher country:** KG
- **Size:** 5.71 MB
- **Data as of:** 2026-09-07
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.erkprog.trigonometryvisact)
- **Privacy policy:** [https://github.com/erlanamanatov/Trigonometry/wiki/Privacy-Policy](https://github.com/erlanamanatov/Trigonometry/wiki/Privacy-Policy)

## Description

This Chrome extension offers an educational tool to master the core concepts of the Unit circle and trigonometric functions through interactive graphs. Users can move points on the unit circle to observe angle changes (in degrees or radians) and their effects on sine and cosine values.

Key features include: interactive graphs for visual understanding, comparison of trigonometric function graphs, detailed function descriptions, the ability to explore how parameters influence graphs, tables of values for special angles, comprehensive trigonometric formulas and identities, and quizzes to reinforce learning. Additional trigonometric functions will be added soon. For support or inquiries, contact stalulerlan@gmail.com.

## Rankings

- #297,196 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.WAKE_LOCK`
- `com.erkprog.trigonometryvisact.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`
- `com.google.android.gms.permission.AD_ID`

## Review summary

Users appreciate this app for its educational value in learning and teaching trigonometry, highlighting its simplicity, good graphing quality, and usefulness for students and teachers. However, some users report technical issues such as errors in the quiz feature and missing graphs for certain trigonometric ratios. Requests for additional features like a save function and advanced graph representations were also noted.

### Pros

- Great for learning and teaching trigonometry
- Useful for students and teachers
- Good graphing quality with customizable settings
- Simple and easy to use UI
- Helpful for refreshing knowledge and completing projects

### Cons

- Quiz feature has errors retrieving data
- Missing graphical representation of all six trigonometric ratios
- Lack of advanced graphing options like custom functions or showing lengths in root form

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.erkprog.trigonometryvisact)