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Prove that:
To Prove: tan-1 x + cot-1 (x + 1) = tan-1 (x2 + x + 1)
Formula Used:
1)
2)
Proof:
LHS = tan-1 x + cot-1 (x + 1) … (1)
= tan-1 (x2 + x + 1)
= RHS
Therefore, LHS = RHS
Hence proved.
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