Mathematics · Inverse Trigonometric Functions
If tan-1 x + tan-1 y = 2π 5, then the value of cot-1 x + cot-1 y is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1π
- 23π 5✓
- 32π 5
- 4π 5
Correct answer
3π 5
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