anonymous
  • anonymous
find the height of a flag pole if the angle of elevation of its top changes from 30 to 45 degrees as the observer advances 10 ft. towards the base
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Pawanyadav
  • Pawanyadav
Let height be h Then distance from pole=h/tan30 =h√3. (Tan30=1/√3) Again Angle is 45 Than distance =h/tan45 =h. (Tan45=1) Now According to question h√3-h=10. Solve for h now.
Pawanyadav
  • Pawanyadav
Make diagram for more illustration Remember tanx=perpendicular/base So. Length of base=perpendicular/tanx
anonymous
  • anonymous
why did you use \[\sqrt{3}\] ?

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anonymous
  • anonymous
@Pawanyadav
Pawanyadav
  • Pawanyadav
tan30. is what ?
anonymous
  • anonymous
\[\sqrt{3}/3\]
Pawanyadav
  • Pawanyadav
We can write it 1/√3
anonymous
  • anonymous
oh i see thank you :)
Pawanyadav
  • Pawanyadav
As 3=√3×√3 Canceling one √3 we get √3/3=1/√3

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