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Greg Needs Help With Trig
Updated: 2/19/2020
Greg Needs Help With Trig
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Storyboard Description

Comic strip for geometry, must have the problems using sine cosine or tangent. One must be finding an angle. Answers must be correct.

Storyboard Text

  • Hey Greg, you seem aggravated, are you okay??
  • I want to figure outthe angle of elevationbetween the tree andthe edge of both ofthe chairs. But I donot know how!!!
  • No not at all, thatChristmas tree isannoying mebecause it is notcentered on the table
  • It is ok, I know how,all you need to do isform a triangle with the points youare measuring and then use sine, cosine,or tangent to find the angle of elevation
  • By finding the length of each side of the triangle, it is very easy to find the angle ofelevation
  • For this problem you would use theinverse cosinecos-(3/5)
  • The angle ofelevation would be 50.1 degrees.
  • 4
  • 90
  • 3
  • ?
  • 5
  • For this one youwant to find what?
  • I want to find thehypotenuse
  • That could easilybe found using thePythagoreantheorem but forpractice we willuse triganometry
  • ?
  • 4
  • Luckily this triangle is a45/45/90 so finding theangle measures is noproblem
  • 90
  • 45
  • 4
  • The hypotenuse will be 5.7 feet.
  • Sin(45) = 4/x
  • We will try to findthe angle of elevation forthis right triangle
  • Tan-(x)=8/4
  • 4 4
  • 8
  • The angle ofelevation will be 63.4 degrees.
  • 8.9
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