Sum of Inverse Tangents (Jee Mains) | ExamDuo
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Principal Value & Basic Properties
Medium
Sum of Inverse Tangents
If tan⁻¹ x + tan⁻¹ y =
4π
5
, then cot⁻¹ x + cot⁻¹ y equals :
SELECT ONE OPTION
A
π
5
B
2π
5
C
3π
5
D
π
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