maths.free › Trigonometry › Degrees and radians

Degrees and radians

Two ways to measure an angle, and converting between them.

A full turn is 360° or 2π radians, so 180° = π. Radians measure an angle by the arc it cuts on a unit circle, which is why calculus prefers them: with radians, the derivative of sin is exactly cos.

作業例: 30 degrees to radians

Trigonometry · Angles

30 degrees to radians

30

ステップバイステップ

  1. 30^\circ \times \frac{\pi}{180^\circ} = \frac{\pi}{6} \approx 0.52360

    Multiply by π/180 (a full turn is 360° = 2π).

答えを明らかにしろ
\frac{\pi}{6} \approx 0.52360

あなた自身を試してみてください

ここに Trigonometry

The unit circleTrigonometric equationsTrigonometric identities