Chapter 6 Crossword (HINT: Use pages 590-684 in your textbook for help)

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Across
  1. 4. a formula express in trigonometric functions of an angle X/2 in terms of function of an angle x.
  2. 7. Identities must hold all values of X (not just some values of X)for which both sides of the equation are defined
  3. 8. this equation find the values of the variable that makes the equation true
  4. 9. The following steps describe what term?____________________. step1: convert all trigonometric expressions to sine and cosines. step2: write all sums or differences of fractions as a single fraction
  5. 10. if equation is true for only some values of the variable, it is a________________.
Down
  1. 1. two angle identity
  2. 2. sum and different identities(include "-" in your answer)
  3. 3. name of the chapter
  4. 5. Fill in the blank. Use the reciprocal, ____________, or Phythagorean identities to simplify trigonometric expressions.
  5. 6. an equation that is true for all of our use of the variable for witch the expression in the equation are defined