anonymous
  • anonymous
prove that cos A/(1-sin A) = (1-sin A)/cos A
Trigonometry
schrodinger
  • schrodinger
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Nnesha
  • Nnesha
multiply top and bottom with the conjugate of the denominator(left side)
Nnesha
  • Nnesha
what is the conjugate of 1-sin a ?
Nnesha
  • Nnesha
here is an example the conjugate of a-b is a+b change the sign in the middle term of two terms

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Nnesha
  • Nnesha
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
Loser66
  • Loser66
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