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Radian measure and arc length

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Now Playing:Radian measure and arc length – Example 1a
Examples
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  1. Use the information in each diagram to determine the value of the variable
    Give your answers to the nearest hundredth of a unit.


    1. Using arc length and radius to calculate angle in radian


    2. using angle in radian to calculate arc length of a circle


    3. Using angle in radian and arc length to calculate radius


    4. Using angle in degree and radius to calculate arc length

Practice
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Radian Measure And Arc Length 2
Find the exact value of trigonometric ratios
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Notes
arc  length=r⋅θ  radian arc\;length= r \cdot \theta\;radian