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sabika13 Group Title

prove this identity: (sinx+tanx)/(cosx+1)=tanx

  • 2 years ago
  • 2 years ago

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  1. hartnn Group Title
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    write tan x as sin x/ cos x

    • 2 years ago
  2. hartnn Group Title
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    what u get ?

    • 2 years ago
  3. sabika13 Group Title
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    (sinx+(sinx/cosx))/(cosx+1) idk what to do after it

    • 2 years ago
  4. hartnn Group Title
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    lets work on numerator factor out sin x , what u get ?

    • 2 years ago
  5. sabika13 Group Title
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    i did: (sinx+cosxsinx)/(cosx+1)

    • 2 years ago
  6. hartnn Group Title
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    u missed a cos x

    • 2 years ago
  7. hartnn Group Title
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    \(\large sin x+sinx/cos x= (sinxcosx+sinx)/cosx \\ \large=sinx(cos x+1)/cos x\) did u get this ?

    • 2 years ago
  8. hartnn Group Title
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    that was numerator only, the denominator still is 1+cos x

    • 2 years ago
  9. sabika13 Group Title
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    howd you get: sinx(xosx+1)/cosx?

    • 2 years ago
  10. sabika13 Group Title
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    cosx*

    • 2 years ago
  11. hartnn Group Title
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    i factored out sin x...

    • 2 years ago
  12. hartnn Group Title
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    \(a+b/c= (ac+b)/c\)

    • 2 years ago
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