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eroshea

  • 3 years ago

arctan(2x)+tan(x)=pi/4, what is x?

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  1. hartnn
    • 3 years ago
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    arctan(2x)+tan(x)=pi/4 ?? or arctan(2x)+arctan(x)=pi/4

  2. hartnn
    • 3 years ago
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    if it is latter, then use arctanA+arctanB = arctan((A+B)/(1-AB)) then take tan on both sides. tan pi/4=1

  3. hartnn
    • 3 years ago
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    u get 3x=1-2x^2 solve this quadatic

  4. eroshea
    • 3 years ago
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    thanks!! i had solve it now :)) could you answer the other question i had closed?? the one with the round holes?

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