Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 Mathematics Trigonometry Inverse Trigonometric Functions

If tan–1x + tan–1y = \(\frac{4\pi}{5}\), then cot–1x + cot–1y equals

1
\(\frac{\pi}{5}\)
2
\(\frac{2\pi}{5}\)
3
\(\frac{3\pi}{5}\)
4
π
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