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eroshea

  • 3 years ago

tan(arctanx+arctan1/4)=7/11 , find x

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  1. hartnn
    • 3 years ago
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    i gave u the formula for arctanA+arctanB...... use it.

  2. hartnn
    • 3 years ago
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    arctanA+arctanB =arctan{(A+B)(1-AB)}

  3. estudier
    • 3 years ago
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    Or you could use double angle formula for tan....

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