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What is tan() in Dart?

Harris Amjad

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The tan() function returns the tangent of a number in radians.

The mathematical representation of the tan() function is shown below.

Mathematical representation of the tangent function

Note:

  • dart:math is required for this function.
  • The tan() function only works for right-angled triangles.

Syntax

double tan(double num)

Parameter

This function requires a number, num, that represents an angle in radians.

In order to convert degrees to radians, use the following formula:

radians = degrees * ( pi / 180 )

Return value

tan() returns the tangent of the number that is sent as a parameter.

Code

import 'dart:convert';
import 'dart:math';
void main() {
//positive number in radians
print("The value of tan(2.3): ${tan(2.3)}");
// negative number in radians
print("The value of tan(-2.3): ${tan(-2.3)}");
//converting the degrees angle into radians and then applying tan()
// degrees = 45.0
// PI = 3.14159265
// result first converts degrees to radians then apply tan
double result=tan(45.0 * (pi / 180.0));
print("The value of tan(45.0 * (pi / 180.0)): ${result}");
}

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dart
communitycreator

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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