Use the law of cosines to find the indicated missing information in the triangle AdBDC|三。|、、EmphasisHeading 1T NormalStrongParagraphStylesa = b' +c-2bcCosAb² =a +c? -2acCosBc =a' +b?-2abCosC10.a = 15b= 13m2C =25°Bc ='mZA =;mZB =F3F4F5F6F7F8F9F10

We will use law of cosine. However we can also use sine rule.

Answered: a = b +c-2bcCosA b2 =a' +c-2acCosB c2 =…

Math

Trigonometry

a = b +c-2bcCosA b2 =a' +c-2acCosB c2 = a' +b?-2abCosC %3D 10. a = 15 b= 13 m2C =25° >B mZA = ;mZB =

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter3: Functions And Graphs

Section3.3: Lines

Problem 26E

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Question

Use the law of cosines to find the indicated missing information in the triangle

AdBDC
|三。|、、
Emphasis
Heading 1
T Normal
Strong
Paragraph
Styles
a = b' +c-2bcCosA
b² =a +c? -2acCosB
c =a' +b?-2abCosC
10.
a = 15
b= 13
m2C =25°
B
c =
'mZA =
;mZB =
F3
F4
F5
F6
F7
F8
F9
F10

Polygon with three sides, three angles, and three vertices. Based on the properties of each side, the types of triangles are scalene (triangle with three three different lengths and three different angles), isosceles (angle with two equal sides and two equal angles), and equilateral (three equal sides and three angles of 60°). The types of angles are acute (less than 90°); obtuse (greater than 90°); and right (90°).

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