Arcsin of 4
Arcsin, Arccos, Arctan, Arccot
What is arcsin(4)?
Answer
arcsin 4
does not exist
Range: arcsin x is an angle from −90° to 90°, so the answer is unique.
The sine of any angle lies between −1 and 1, and 4 is outside — no angle has such a sine.
If 4 is an angle in degrees, you need the direct function: sin 4° ≈ 0.0698.
An angle α with sin α = 4 would have to lie on the line y = 4, but that line passes above the circle.
The line y = 4 passes above the circle, beyond the drawing: they have no common point, so no angle α has sin α = 4.
| Function | Degrees | Radians |
|---|---|---|
| arcsin(4) | does not exist | — |
| arccos(4) | does not exist | — |
| arctan(4) | ≈ 75.9638° | ≈ 1.3258 |
| arccot(4) | ≈ 14.0362° | ≈ 0.2450 |
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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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Arcsine of nearby values
| x | arcsin x |
|---|---|
| 4/5 | ≈ 53.1301° |
| √3/2 | 60° = π/3 |
| 0.9 | ≈ 64.1581° |
| 1 | 90° = π/2 |
| 3/2 | does not exist |
| 2 | does not exist |
| 4 | does not exist |