9qfwumnsxr 9qfwumnsxr

13-03-2022
Mathematics

contestada

find c! please explain the steps and help me find the answer.

find c please explain the steps and help me find the answer class=

Respuesta :

chibunduoyibe chibunduoyibe

13-03-2022

Answer:

34.78

Step-by-step explanation:

using cosine rule

AB^2 = CB^2 + AC^2 -2(CB × AC × COS C)

18^2 = 17^2 + 27^2 -2(27×17×COS C)

324= 289+729- 918COSC

324-289-789= -918COSC

-754= -918COSC

COS C = 754/918

COS C = 0.82135076253

C= arccos(0.82135076253)

C= 34.78(2 dp)

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