Arctan of 0.9
Arcsin, Arccos, Arctan, Arccot
What is arctan(0.9)?
Answer
arctan(0.9) ≈
41.9872° ≈ 0.7328 rad
Range: arctan x is an angle strictly between −90° and 90°, so the answer is unique.
≈ — the value is not a table one; rounded to 4 decimal places.
arctan(0.9) is the angle α in (−90°, 90°) with tan α = 0.9.
tan 41.9872° ≈ 0.9000
α = arctan(0.9) ≈ 41.9872°
P ≈ (0.7433, 0.6690)
T(1, 0.9) is where line OP meets the line x = 1; highlighted: tan α = 0.9.
| Function | Degrees | Radians |
|---|---|---|
| arcsin(0.9) | ≈ 64.1581° | ≈ 1.1198 |
| arccos(0.9) | ≈ 25.8419° | ≈ 0.4510 |
| arctan(0.9) | ≈ 41.9872° | ≈ 0.7328 |
| arccot(0.9) | ≈ 48.0128° | ≈ 0.8380 |
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See Also
- Sin, Cos, Tan, Cot of an Angle - Exact value in square roots and the decimal, with reduction to an acute angle on the unit circle
- Square Root Calculator - Calculate the square root of any number
- Simplify Square Root Calculator - Write any square root in simplest radical form, step by step
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Arctangent of nearby values
| x | arctan x |
|---|---|
| 3/4 | ≈ 36.8699° |
| 4/5 | ≈ 38.6598° |
| 5/6 | ≈ 39.8056° |
| 0.9 | ≈ 41.9872° |
| 1 | 45° = π/4 |
| 3/2 | ≈ 56.3099° |
| 5/3 | ≈ 59.0362° |