Trig Proof 9
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Lesson Description:
Two more trig proofs shown and explained.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Questions answered by this video:
- How do you verify trig identities?
- How do you prove that sin2x/2sinx = cos^2(x/2) - sin^2(x/2)?
- How do you prove that tan(x/2) = cscx - cotx?
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Staff Review
This trig proof lesson shows how to prove two different trig identities by using your knowledge of basic trig identities. All steps involved in proving the identities are shown and explained. The goal is to get the two sides of the equal sign to look like each other.
