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Trig ratios

  • Thread starter Miike012
  • Start date
  • #1
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Homework Statement



How does the pythagorean therm. give us sin cos tan and their recipr.? I dont understand how a^2 + b^2 = c^2 give you those ratios?

Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
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The pythagorean theorem will give you the pythagorean identities if you let a=opposite side b=adjacent side, c= hypotenuse. You can derive all the pythagorean identities by dividing by the different sides.

You may want to skim over this http://mathsfirst.massey.ac.nz/Trig/TrigRatio.htm or even better take a look at the khan academy library of videos on trig.
 
  • #3
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Thank you.
 

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