anonymous
  • anonymous
Please help me! Will fan and medal! 1)In two or more complete sentences, explain how to find the exact value of secant(13pi/6) including quadrant location. 2)In two or more complete sentences, explain how to find the exact value of cotangent (7pi/4) including quadrant location.
Mathematics
schrodinger
  • schrodinger
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welshfella
  • welshfella
13pi/6 - 2pi = 13pi/6 - 12pi/6 = pi/6 which is an angle in the first quadrant. You can find the cosine of pi/6 from the standard 30/60/90 triangle . The secant is = 1 / cosine.
welshfella
  • welshfella
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welshfella
  • welshfella
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welshfella
  • welshfella
2pi - 7pi/4 = 8pi/4 - 7pi/4 = pi/4 . This is an angle in the 4th quadrant where the tangent is negative. You can find the exact values by considering the standard triangle 45-45-90 . The cotangent = 1 / tangent.
welshfella
  • welshfella
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welshfella
  • welshfella
note pi/6 = 30 degrees and pi/4 = 45 degrees.
anonymous
  • anonymous
thank you so much!
anonymous
  • anonymous
welshfella
  • welshfella
yw

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