Trig Explorer
Drag the point on the circle — or use the slider below
Current Angle
≈ π/4
Controls
Angle
45°
Radius
1.0
Units
Degrees
Radians
Legend
Hypotenuse (radius r)
Adjacent side = r · cos(θ)
Opposite side = r · sin(θ)
Tangent = sin / cos
Trig Functions
sin(θ)
0.707
opposite / hypotenuse = y / r
cos(θ)
0.707
adjacent / hypotenuse = x / r
tan(θ)
1.000
opposite / adjacent = y / x
undefined (division by zero)