Arctan of 3/5

Arcsin, Arccos, Arctan, Arccot
Function
x

What is arctan(3/5)?

Answer

arctan(3/5) ≈
30.9638° ≈ 0.5404 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.

3/5 = 0.6.

arctan(3/5) is the angle α in (−90°, 90°) with tan α = 3/5.

tan 30.9638° ≈ 0.6000

xyOP

α = arctan(3/5) ≈ 30.9638°

P ≈ (0.8575, 0.5145)

T(1, 3/5) is where line OP meets the line x = 1; highlighted: tan α = 3/5.

All four inverse functions of 3/5
FunctionDegreesRadians
arcsin(3/5)≈ 36.8699°≈ 0.6435
arccos(3/5)≈ 53.1301°≈ 0.9273
arctan(3/5)≈ 30.9638°≈ 0.5404
arccot(3/5)≈ 59.0362°≈ 1.0304

See Also

FAQ

What is arctan(3/5)?

arctan(3/5) ≈ 30.9638° ≈ 0.5404 rad

How to convert arctan(3/5) to radians?

Multiply the angle in degrees by π/180: 30.9638° × π/180 ≈ 0.5404 rad.

Why does a calculator show 0.5404 for arctan(3/5)?

The calculator is in radian mode (RAD) and gives the angle in radians: arctan(3/5) ≈ 0.5404 rad. In degrees (DEG) it is ≈ 30.9638°.