Use either the cofunction or reciprocal identities to complete each of the following:
a. If sin 18o=0.3
then csc 18o
b. If sin 18o=0.3
then cos 72o
c. If cot 53o=0.75
then tan 53o
d. If cot 53o=0.75
then the tangent of what angle is 0.75 ?
e. If sec 60o=2
then the cosine of what angle is 0.5 ?
