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AP EAMCET20227 Jul 2022Evening ShiftMathematicsProperties of TrianglesActual

In any A B C, 2 A a^2 - 2 B b^2 =

Options

  1. Aa^2-b^2
  2. B1 a^2 - 1 b^2
  3. Ca^2+b^2
  4. D1 a^2 + 1 b^2

Correct answer

B. 1 a^2 - 1 b^2

Step-by-step solution

aligned & 2 A a^2 - 2 B b^2 = 1-2 ^2 A a^2 - 1-2 ^2 B b^2 & = 1 a^2 - 1 b^2 -2 [ ^2 A a^2 - ^2 B b^2 ] & = 1 a^2 - 1 b^2 [ A a = B b ] aligned

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