Q51

Question:

If tan θ + cot θ = 5, find the value of tan²θ + cot²θ.

यदि tan θ + cot θ = 5 हो, तो tan²θ + cot²θ का मान क्या होगा?

Options:

  • a) 23
  • b) 25
  • c) 27
  • d) 21
  • a) 23
  • b) 25
  • c) 27
  • d) 21

correct answer : a)

Explanation:

(tan θ + cot θ)² = tan²θ + 2·tan θ·cot θ + cot²θ. 25 = tan²θ + 2(1) + cot²θ. tan²θ + cot²θ = 23.

(tan θ + cot θ)² = 25। tan²θ + 2(1) + cot²θ = 25। tan²θ + cot²θ = 23।

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