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kaylala

  • 2 years ago

trigonometry: Identify if the underlined word/s is true or false If false change it to the appropriate one If the arc length is 30π_feet with central angle equal to (3/4)revolution. The radius is equal to 20feet. 20 is the underlined word

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  1. kaylala
    • 2 years ago
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    here's a picture of the question: see item # 7

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  2. ***[ISURU]***
    • 2 years ago
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    use .. \[S = r \ \theta\]

  3. ***[ISURU]***
    • 2 years ago
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    where S is the arc length r is the radius theta is the angle measure in radiant

  4. ***[ISURU]***
    • 2 years ago
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    angle of 3/4 revolution = 270 degrees = 3pi /2

  5. ***[ISURU]***
    • 2 years ago
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    and the length of the arc is 30 pi feet

  6. ***[ISURU]***
    • 2 years ago
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    \[S = r \ \theta\]\[30 \pi = r \times (\frac{ 3 \pi }{ 2 })\]

  7. ***[ISURU]***
    • 2 years ago
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    now make r the subject and c if the value u get for r is the same as in the question ..

  8. ***[ISURU]***
    • 2 years ago
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    got it :) ?

  9. kaylala
    • 2 years ago
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    okay thanks. so it is true

  10. ***[ISURU]***
    • 2 years ago
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    u r welcome... and yes the statement is true!

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