Math 30-1Ratios and equations

1 b. i. Use a calculator to complete the table. Try a few of you own b-values as well. Calculator output for cos-'b ).5 60 90 -0.5 - 60 - 1 0 - 3 72. 54 - CS - 3 - 72. 54 0 . 7 45.57 ii. Describe a rule that predicts which quadrant the calculator output of cos b will lie in given a b-value. c. For what values of a and b do the 0-values given by a calculator correspond to reference angles? d. Give equations that can be used to determine the reference angle if the angle given by a calculator is not a reference angle. (Hint: A different equation is required for each applicable quadrant.)