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# trigonometry-equations

Trigonometry rules to solve equations for angles and sides

2.0.1latest

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# trigonometry-equations   Trigonometry rules to solve equations for angles and sides

## Installation

Run:

```npm install trigonometry-equations --save ```

## Usage

1. Construct an object mapping angles and sides to their respective objects where the key is a number in the range [0, 3) and the value is the given number.
2. Pass the object to an equation function that corresponds with an appropriate mathematical rule.
3. The function will return an object similar to the input except it will include a key-value pair containing the solution with full numerical precision.
```import { ambiguousCaseRule, angleRule, cosineRule, sineRule } from 'trigonometry-equations'; // ES5 / CommonJS require works in addition to ES6 import // var equations = require('trigonometry-equations'); // In ES5 call equations.sineRule, etc let unsolvedTriangle = { angles: { 1: 35, 2: 105 }, sides: { 1: 7 } }; console.log(sineRule(unsolvedTriangle)); /* { angles: { 1: 35, 2: 105 }, sides: { 1: 7, 2: 11.788282006559363 } } */ unsolvedTriangle = { angles: { 2: 59 }, sides: { 0: 3.6, 1: 5.3 } }; console.log(cosineRule(unsolvedTriangle)); /* { angles: { 2: 59 }, sides: { 0: 3.6, 1: 5.3, 2: 4.6255969410912074 } } */ /* cosineRule has an optional parameter allowing you to specify the angle solved when you pass it three sides. If you don't pass in this parameter it will solve the first unsolved angle of the triangle. */ unsolvedTriangle = { sides: { 0: 8, 1: 5, 2: 9 } }; const findAngle = { findAngle: 1 }; console.log(cosineRule(unsolvedTriangle, findAngle)); /* { angles: { 1: 33.55730976192071 }, sides: { 0: 8, 1: 5, 2: 9 } } */ unsolvedTriangle = { angles: { 0: 60, 1: 60 }, sides: { 1: 20 } }; console.log(angleRule(unsolvedTriangle)); /* { angles: { 0: 60, 1: 60, 2: 60 }, sides: { 1: 20 } } */ unsolvedTriangle = { angles: { 1: 39 }, sides: { 1: 28, 2: 41 } }; // if there is no solution ambiguousCaseRule will return null console.log(ambiguousCaseRule(unsolvedTriangle)); /* { ambiguous: { angles: { 0: 28.147082985775114, 1: 39, 2: 112.85291701422489 }, sides: { 0: 20.988713127721486, 1: 28, 2: 41 } } } */ ```

## Contributing

A new function or a fixed regression should include matching test coverage. Commits should adhere to cz-conventional-changelog which can be done easily by running git cz or npm run commit.

## What is trigonometry-equations?

Trigonometry rules to solve equations for angles and sides

## Is trigonometry-equations popular?

The npm package trigonometry-equations receives a total of 92 weekly downloads. As such, trigonometry-equations popularity was classified as not popular.

## Is trigonometry-equations well maintained?

We found that trigonometry-equations demonstrated a not healthy version release cadence and project activity. It has 1 open source maintainer collaborating on the project.

Last updated on 23 Feb 2017 Product