How to remember trigonometric values of reference angles

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Uploaded by on Aug 11, 2010

All credits due to my math teacher from high school in Vietnam in 2003. His name is Hai.
Your feedbacks are much appreciated for future tutorials. If ya like it, feel free to pass it along, post it on facebook etc... please help other people who are struggling.

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Uploader Comments (duydaniel)

  • Tangent is Sin/Cos so you just take the number of fingers on the left divided by the right and take square root of the result.

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  • OMG THIS IS GENIUS. thanks for sharing!

  • This is excellent!

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