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Home > PC > Chapter 6 > Lesson 6.3.2 > Problem 6-124

6-124.
  1. Prove that the following trigonometric equations are true. Homework Help ✎

    1. (sec x − cos x) = 1

    2. (cos x + 1)(cos x − 1) + sin2 x = 0

1. Change all terms to sine and cosine.
2. Get a common denominator for the terms in the parentheses.
3. Use the Fundamental Pythagorean Identity.

1. Multiply out on the left side.
2. Use the Fundamental Pythagorean Identity.