1 2 3 4 l5 l b l / 8 l 9. l10. 11 12 13 5) Find the area of the triangle. Given sides a = 12m, b= 24m, c= 30 Rhndaswa to nar t Show Set up 1 bc SinA 2. 2=62+ c2-2bc CosA Area = %3D b2= a2+ c2-2ac CosB Area = ab · SinC %3D c2 = a2+ b2 -2ab CosC Area ac• SinB %3D 12sq2=24sq2+30sq2-2(24)(30)cosA = (24)(30)sin223 Area = %3D 22.3 Find angle = %3D - notes 112112N

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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Question
EL ZI
5) Find the area of the triangle.
Given sides a = 12m, b= 24m, c= 30
RHAnd sw to ara t
Show Set up
Area =- bc • SinA
a2= b2+ c2-2bc CosA
b2=a2+ c2-2ac CosB
c2 = a2+b2-2ab CosC
1
Area =
ab SinC
Area ==
ac SinB
%3D
12sq2=24sq2+30sq2-2(24)(30)cosA
= ½(24)(30)sin223
Area =
Find angle =
22.3
rnotes
DELL
%
&
*
5
7
8
9
y u
i
Transcribed Image Text:EL ZI 5) Find the area of the triangle. Given sides a = 12m, b= 24m, c= 30 RHAnd sw to ara t Show Set up Area =- bc • SinA a2= b2+ c2-2bc CosA b2=a2+ c2-2ac CosB c2 = a2+b2-2ab CosC 1 Area = ab SinC Area == ac SinB %3D 12sq2=24sq2+30sq2-2(24)(30)cosA = ½(24)(30)sin223 Area = Find angle = 22.3 rnotes DELL % & * 5 7 8 9 y u i
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