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If fraction numerator tan space left parenthesis alpha plus beta minus gamma right parenthesis over denominator tan space left parenthesis alpha minus beta plus gamma right parenthesis end fraction equals fraction numerator tan begin display style space end style gamma over denominator tan begin display style space end style beta end fraction left parenthesis beta not equal to gamma right parenthesis then sin space 2 alpha plus sin space 2 beta plus sin space 2 gamma =

  1. 0
  2. 1
  3. 2
  4. 1 divided by 2

The correct answer is: 0

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