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Prove that tan^(-1). 1/7 + tan^(-1). 1...

Prove that
`tan^(-1). 1/7 + tan^(-1). 1/13 = tan^(-1). 2/9`

Answer

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Prove that 2 tan^(-1) . 1/7 +tan^(-1) . 1/3 = tan^(-1) . 9/13

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Knowledge Check

  • tan^(-1)""1/7+2tan^(-1)"" 1/3=

    A
    `-pi//4`
    B
    `pi//4`
    C
    `pi//2`
    D
    `-pi//2`

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