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Show that Tan^(-1) 1/7 + Tan^(-1) 1/8 = ...

Show that `Tan^(-1) 1/7 + Tan^(-1) 1/8 = Cot^(-1) 201/43 + Cot^(-1) 18`

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The correct Answer is:
`L.H.S = R.H.S`
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