Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Question
In Problems 21–30, use the Half-angle Formulas to find the exact value of each expression.
Transcribed Image Text:97
24. tan
21. sin 22.5°
22. cos 22.5°
23. tan
8
157
27. sec
8
25. cos 165°
26. sin 195°
28. csc
8
37
29. sin
30. cos
8
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