Radians

Radian Measure

An angle measurement where one radian equals the angle subtended by an arc equal in length to the radius.

รายละเอียดทางเทคนิค

Radians functions relate angles to side ratios in right triangles. In computing, angles are typically in radians (π radians = 180°). Key identities: sin²θ + cos²θ = 1, sin(2θ) = 2sinθcosθ. Applications include wave generation (audio synthesis), rotation transforms (2D/3D graphics), signal processing (Fourier analysis), and geolocation (haversine formula for great-circle distance). JavaScript's Math.sin() expects radians, so convert degrees with: radians = degrees × π / 180.

ตัวอย่าง

```
Trigonometric functions (right triangle):

  sin(θ) = opposite / hypotenuse
  cos(θ) = adjacent / hypotenuse
  tan(θ) = opposite / adjacent

  For a 30° angle:
  sin(30°) = 0.5,  cos(30°) ≈ 0.866,  tan(30°) ≈ 0.577

  Radians: 180° = π rad → degrees × π / 180 = radians
```

เครื่องมือที่เกี่ยวข้อง

P Percentage Calculator R Ratio Calculator A Average Calculator G GCD & LCM Calculator P Prime Number Tools E Equation Solver U Unit Converter F Fraction Calculator R Roman Numeral Converter F Fibonacci Calculator L Logarithm Calculator S Statistics Calculator N Number Base Converter M Matrix Calculator T Trigonometry Calculator

คำศัพท์ที่เกี่ยวข้อง

Combination Correlation Cross Product Big O Notation Boolean Algebra Complex Number Bayes' Theorem Binomial Distribution