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PLEASE HURRY 100 POINTS!
Marques made a mistake when solving this problem. On what line did he make the error?
A) Line 1
B) Line 2
C) Line 3
D) Line 4
E) Line 5

PLEASE HURRY 100 POINTS Marques made a mistake when solving this problem On what line did he make the error A Line 1 B Line 2 C Line 3 D Line 4 E Line 5 class=

Respuesta :

fieryanswererft

Answer:

B) Line 2

using the formula:

[tex]\sf c^2 = a^2 + b^2 -2abcos(C)[/tex]

[tex]\sf c^2 = 14^2 + 8^2 -2(14)(8)cos(80)[/tex]

[tex]\sf c^2 = 196 + 64 -244 *0.173[/tex]

[tex]\sf c^2 = 221.1[/tex]

[tex]\sf \sqrt{c} = \sqrt{221.1}[/tex]

[tex]\sf c = 14.87[/tex]

Use law of cosines

  • c²=a²+b²-2abcosC
  • c²=14²+8²-2(14)(8)cos80
  • c²=196+64-244(0.173)
  • c²=221.1
  • c=14.87

Error at line 2

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