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Q:

व्यंजक का मान क्या होगा
 cos 2A cos2B+sin2(A-B)-sin2(A+B)?

  • 1
    sin(2A-2B)
  • 2
    cos(2A+2B)
  • 3
    cos(2A-2B)
  • 4
    sin(2A+2B)
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Answer : 2. "cos(2A+2B)"

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