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anonymous

  • one year ago

prove that cos A/(1-sin A) = (1-sin A)/cos A

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  1. Nnesha
    • one year ago
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    multiply top and bottom with the conjugate of the denominator(left side)

  2. Nnesha
    • one year ago
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    what is the conjugate of 1-sin a ?

  3. Nnesha
    • one year ago
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    here is an example the conjugate of a-b is a+b change the sign in the middle term of two terms

  4. Nnesha
    • one year ago
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    1st) multiply top and bottom with the conjugate of the denominator 2nd) apply the foil method for the denominator 3rd) use the identity sin^2x +cos^2 x=1

  5. Loser66
    • one year ago
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