Across
- 4. a formula express in trigonometric functions of an angle X/2 in terms of function of an angle x.
- 7. Identities must hold all values of X (not just some values of X)for which both sides of the equation are defined
- 8. this equation find the values of the variable that makes the equation true
- 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
- 10. if equation is true for only some values of the variable, it is a________________.
Down
- 1. two angle identity
- 2. sum and different identities(include "-" in your answer)
- 3. name of the chapter
- 5. Fill in the blank. Use the reciprocal, ____________, or Phythagorean identities to simplify trigonometric expressions.
- 6. an equation that is true for all of our use of the variable for witch the expression in the equation are defined