Download - SOH CAH TOA
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SOH CAH TOABy: Corinne Fahs
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PurposeThe purpose of this PowerPoint is to help with
the understanding of trigonometry by the use of SOH CAH TOA.
The formula is presented in words, and also with variables. The variables are then substituted with actual variables based off a given triangle.
Practice questions are then given.
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SOHSOH stands for Sin, Opposite, Hypotenuse.
Sin of the angle is equal to opposite over hypotenuse. >> SinX=O/H
Using the triangle below the formula would
be SinA=a/c
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CAHCAH stands for Cos, Adjacent, Hypotenuse.
Cos of the angle is equal to adjacent over hypotenuse. >> CosX=A/H
Using the triangle below the formula would
be CosA=b/c
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TOATOA stands for Tan, Opposite, Adjacent.
Tan of the angle is equal to the opposite over the adjacent. >> TanX=O/A
Using the triangle below the formula would
be TanA=a/b
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Practice1. Given that a= 3 and b=4. What is the value of
angle A?
2. Given that a=2 and c=4. What is the value of angle A?
3. Given that b=5 and c=8. What is the value
of angle B?
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Answers1. 36.87° Tan^-1(3/4)= 36.87
2. 30° Exp: Sin^-1(2/4)= 30
3. 51.32° Exp: Cos^-1(5/8)=51.32
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