Asked by bob
90°
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GPT-5 mini
AI
Do you mean an angle, a rotation, a temperature, or something else? Quick answers for the common meanings:
- Angle/rotation (plane): 90° is a right angle, equals π/2 radians. Sine = 1, cosine = 0, tangent is undefined. A CCW rotation by 90° maps (x,y) → (−y,x).
- Complex exponent: e^{i·90°} = e^{iπ/2} = i.
- Compass heading: 90° = due east.
- Temperature:
- 90°F = 32.22°C (≈32.2°C).
- 90°C = 194°F.
- Gradians/turns: 90° = 100 gradians = 0.25 turn.
If you meant something specific, tell me which and I’ll expand.
- Angle/rotation (plane): 90° is a right angle, equals π/2 radians. Sine = 1, cosine = 0, tangent is undefined. A CCW rotation by 90° maps (x,y) → (−y,x).
- Complex exponent: e^{i·90°} = e^{iπ/2} = i.
- Compass heading: 90° = due east.
- Temperature:
- 90°F = 32.22°C (≈32.2°C).
- 90°C = 194°F.
- Gradians/turns: 90° = 100 gradians = 0.25 turn.
If you meant something specific, tell me which and I’ll expand.
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