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  • 20-07-2017
  • Mathematics
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Simplify square root of (1-cos)(1+cos)/cos^2

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Аноним Аноним
  • 20-07-2017
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(1-cosx)(1+cosx)=1+cosx-cosx-cos²x=1-cos²x=sin²x


sin²x
____
cos²x


tg²x
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