Radians and Wave Oscillation
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Radians and Wave Oscillation
Angles in radians
A radian is the angle at the centre of a circle subtended by an arc whose length equals the radius. A complete turn is 2π radians, or 360°. For an angle θ in radians, arc length s = rθ.
Describing oscillations
A sinusoidal oscillation can be written y = A sin(ωt), where A is the amplitude, ω is the angular frequency in radians per second, and t is time in seconds. Its period is T = 2π/ω. Frequency f is measured in hertz, with ω = 2πf.
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3 printable pages
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