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Last updated at December 16, 2024 by Teachoo
  
 
Transcript
Question 4 Find the value of cot (tan−1 α + cot−1 α) cot (tan−1 𝛂 + cot−1 𝛂) = cot (𝝅/𝟐) = cot ((180°)/2) = cot (90°) = 0 (As tan−1 x + cot−1 x = 𝜋/2)