amya57
amya57 amya57
  • 13-04-2018
  • Mathematics
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Find the measure of angle A

Find the measure of angle A class=

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Goalinetsky
Goalinetsky Goalinetsky
  • 13-04-2018
Apply the law of cosines. and solve for A

[tex]14^{2} = 11^{2} + 11^{2} - 2(11)(11)cos(A) \\ 196 = 121 + 121 - 242cos(A) \\ -46 = -242cos(A) \\cos(A) = 0.1900826446[/tex]

 A = 79.04239272, or 79

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