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Trigonometric Ratios with a Calculator

Solving for values when triangles aren't special right triangles.

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Practice Trigonometric Ratios with a Calculator
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Sine Cosine Tangent
teacher Contributed

RWA Sine, Cosine, Tangent

Topic

The Earth, Moon and Sun

Vocabulary

  • Sine
  • Cosine
  • Tangent
  • Trigonometric Ratios With a Calculator
  • Inverse Trigonometric Ratios

Student Exploration

How did the ancient Greek astronomers determine the size of and distance from the Earth, Moon, and Sun?

Watch the video to learn more:

http://thewatchers.adorraeli.com/2011/09/21/how-can-we-see-the-sun-and-the-moon-at-the-same-time/

Extension Investigation

Parallax - To Determine Stellar Distances

See how to duplicate their methods

http://www.astro.washington.edu/courses/astro211/CoursePack/cp03a_distance_sun.pdf

Dialate a right Triangle

http://www.ferrismath.com/int1/Sine,%20Cosine%20and%20Tangent.htm

Layering (optional)

Trigonometric Parallax

Trigonometry in the real world

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