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Q:

If sin 3A=cos(A+100), where 3A is an acute angel, then what is the value of $$2cosec{3A\over2}+6sin^23A-{3\over 2}tan^2\ 3A$$?

  • 1
    4
  • 2
    $$7\over 4$$
  • 3
    5
  • 4
    $$17\over 2$$
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Answer : 1. "4"

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