matlee
  • matlee
Precalculus help
Mathematics
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
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matlee
  • matlee
s=r0 where s= 40 R = ? and 0 = 20 degrees Its not zero is theta
anonymous
  • anonymous
Convert the angle to radians, then plug the numbers into the formula. Are you looking for an exact answer or from a calculator?
matlee
  • matlee
Fractions would be nice , im just looking how to work out the problem because i have the answer. Theres also an explanation but i dont understand it at all. http://www.slader.com/textbook/9780321356932-precalculus-graphical-numerical-algebraic-7th-edition/356/section-41-exercises/31/

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anonymous
  • anonymous
s = rΘ is the general formula for arc length, but the angle has to be in radians, not degrees. Multiply 20° by \(\frac{ \pi }{ 180 }\) to convert the angle to radians. You should get π/9 for this step. then plug into the formula. 40 = r(pi/9) \[r=\frac{ 40 }{ \frac{ \pi }{ 9 } }\] r = 360/π

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