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AP EAMCET20225 Jul 2022Morning ShiftMathematicsProperties of TrianglesActual

In a A B C, a=6, b=5 and c=4 , then 2 A=

Options

  1. A- 31 32
  2. B- 15 16
  3. C31 32
  4. D15 16

Correct answer

A. - 31 32

Step-by-step solution

In a A B C, a=6 units, b=5 units and c=4 units As we know that, A= b^2+c^2-a^2 2 b c A= b^2+c^2-a^2 2 b c = 5^2+4^2-6^2 2 5 4 = 1 8 As we know that, 2 A= ^2 A- ^2 A aligned & =2 ^2 A-1=2 ( 1 8 )^2-1 & = 1 32 -1= -31 32 aligned

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