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Miscellaneous·2022·Easy

If A, B, C are acute angles and sin(B + C - A) = cos(C + A - B) = tan(A + B - C) = 1 then what is (A + B + C) equal to ?

If A, B, C are acute angles and sin(B + C - A) = cos(C + A - B) = tan(A + B - C) = 1 then what is (A + B + C) equal to ?

Options

  1. a.

    90°

  2. b.

    120°

  3. c.

    135°

    Correct answer
  4. d.

    150°

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