UCSS Math II 5.9.5 Example 3

Author:
Walch Education
Topic:
Cosine, Sine
Write a two-column proof of the trigonometric identity .
  1. Create the outline for the two-column proof.
  2. Rewrite the expression as the sum of two fractions.
  3. Use the reciprocal identity to simplify the expression .
  4. Use the ratio identity to rewrite the expression .
  5. Fill in the columns of the two-column proof.
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