Question

Find the value of tan-1⁡(13)+tan-1⁡(15)+tan-1⁡(\frac{1}{7})[/latex]

Options :

  1. tan⁻¹(4/7)

  2. tan⁻¹⁡(9/7)

  3. tan⁻¹(7/9)

  4. tan⁻¹1

Show Answer

Answer :

tan⁻¹(7/9)

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