tan⁻¹(1/2) + cot⁻¹3 এর মান কোনটি?

ব্যাখ্যা

cot⁻¹3 = tan⁻¹(1/3) ∴ tan⁻¹(1/2) + tan⁻¹(1/3) = tan⁻¹[(1/2 + 1/3)/(1 − 1/6)] = tan⁻¹[(5/6)/(5/6)] = tan⁻¹1 = π/4