Online Calculators & Tools
Calculation with tan(angle deg|rad):
x | tan(x) | |
---|---|---|
degrees | radians | |
-60° | -π/3 | -1.732050808 |
-90° | -π/2 | not defined |
-30° | -π/6 | -0.577350269 |
-45° | -π/4 | -1 |
0° | 0 | 0 |
30° | π/6 | 0.577350269 |
60° | π/3 | 1.732050808 |
45° | π/4 | 1 |
90° | π/2 | not defined |
Rule name | Rule |
---|---|
Symmetry | tan(-θ) = -tan θ |
Symmetry | tan(90°- θ) = cot θ |
tan θ = sin θ / cos θ | |
tan θ = 1 / cot θ | |
Double angle | tan 2θ = 2 tan θ / (1 - tan2 θ) |
Angles sum | tan(α+β) = (tan α + tan β) / (1 - tan α tan β) |
Angles difference | tan(α-β) = (tan α - tan β) / (1 + tan α tan β) |
Derivative | tan' x = 1 / cos2(x) |
Integral | ∫ tan x dx = - ln |cos x| + C |
Euler's formula | tan x = (eix - e-ix) / i (eix + e-ix) |