If we know the values of the sine and cosine of x and y, we can find the value of cos(x - y) by using the Formula for Cosine. State the formula: cos(x - y) = .

Compare the following pair of numbers a and b in three ways. a. find the ratio of a to b. b. find the ratio of b to a. c. complete the sentence: a is percent of b. a=120 and b=340 a. the ratio of a to b is . b. the ratio of b to a is . c. a is nothing percent of b.