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If 2(cos2θ - sin2θ) = 1, (θ is positive acute angle), then cotθ is equal to?   (SSC CHSL 2013)
  • a)
    √3
  • b)
    -√3
  • c)
    1/√3
  • d)
    1
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
If 2(cos2θ - sin2θ) = 1, (θ is positive acute angle)...
2 cos 2θ = 1
cos 2θ = 1/2
θ = 30°
cot 30° = √3
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If 2(cos2θ - sin2θ) = 1, (θ is positive acute angle), then cotθ is equal to? (SSC CHSL 2013)a)√3b)-√3c)1/√3d)1Correct answer is option 'A'. Can you explain this answer?
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