Answer
a) i) 0.9848
ii) 0.9063
b) The pairs' values are equal
c) The angles are complementary and sin of an angle equals the cos of its complement
Work Step by Step
Use a calculator
sin80 = 0.9848
cos25 = 0.9063
sin65 = 0.9063
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 10 - Radical Expressions and Equations - 10-6 Trigonometric Ratios - Practice and Problem-Solving Exercises - Page 638: 36
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