The rotating radius traces the point (cos θ, sin θ) on a circle of radius 1. Project onto the vertical axis = sin (red), the horizontal axis = cos (green). Because R = 1, always sin²θ + cos²θ = 1.
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Drag the Angle θ bar to set it by hand · click a special angle · switch the Scenario (highlight sin/cos · tan · identity · Lissajous)
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sin θ · cos θ · tan θ over time (θ increasing)sincostan (clamped ±2)