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ACTIVITY 1 Use the Law of cosines to determine the indicated side and angle. (Draw the triangle first.) 1) Triangle ABC: AC = 21, AB = 42, mzA= 39°. Find CB. 2) Triangle DEF: DE = 25, EF = 25, mzE= 140°. Find DF. a = CB, b = AC, c = AB a = DE, b = DE, c = DF

ACTIVITY 1 Use the Law of cosines to determine the indicated side and angle. (Draw the triangle first.) 1) Triangle ABC: AC = 21, AB = 42, mzA= 39°. Find CB. 2) Triangle DEF: DE = 25, EF = 25, mzE= 140°. Find DF. a = CB, b = AC, c = AB a = DE, b = DE, c = DF

Trigonometry (11th Edition)
Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
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ACTIVITY 1 Use the Law of cosines to determine the indicated side and angle. (Draw the triangle first.) 1) Triangle ABC: AC = 21, AB = 42, mzA = 39°. Find CB. 2) Triangle DEF: DE = 25, EF = 25, mzE = 140°. Find DF. a = CB, b = AC, c = AB a = DE, b = DE, c = DF
Transcribed Image Text:ACTIVITY 1 Use the Law of cosines to determine the indicated side and angle. (Draw the triangle first.) 1) Triangle ABC: AC = 21, AB = 42, mzA = 39°. Find CB. 2) Triangle DEF: DE = 25, EF = 25, mzE = 140°. Find DF. a = CB, b = AC, c = AB a = DE, b = DE, c = DF
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