Page 38 - Calculus Workbook For Dummies

22 Part I: Pre-Calculus Review

Trigonometric Calisthenics

Believe it or not, trig is a very practical, real-world branch of mathematics, because it
involves the measurement of lengths and angles. Surveyors use it when surveying prop-
erty, making topographical maps, and so on. The ancient Greeks and Alexandrians,
among others, knew not only simple SohCahToa stuff, but a lot of sophisticated trig as
well. They used it for building, navigation, and astronomy. It’s all over the place in the
study of calculus, so if you snoozed through high school trig, WAKE UP! and review the
following problems. (If you want to delve further into trig (and functions), check out
Calculus For Dummies.)

7. Use the right triangle to complete the 8. Use the triangle from problem 7 to com-
table. plete the following table.
sin60c = ____ csc60c = ____
cos60c = ____ sec60c = ____
tan60c = ____ cot60c = ____
2
1
Solve It

30˚
3
sin30c = ____ csc30c = ____
cos30c = ____ sec30c = ____
tan30c = ____ cot30c = ____

Solve It