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JEE Mains · Maths · STD 11 - 3. trignometrical ratios,functions and identities

જો \(\cot \alpha=1\) અને \(\sec \beta=-\frac{5}{3}\), જ્યાં \(\pi<\alpha<\frac{3 \pi}{2}\) અને \(\frac{\pi}{2}<\beta<\pi\) છે તો \(\tan (\alpha+\beta)\) ની કીમત અને \(\alpha+\beta\) નુ ચરણ અનુક્રમે ................. છે

  1. A \(-\frac{1}{7}\) અને \(IV\) \(^{\text {th }}\) ચરણ
  2. B \(7\) અને \(I ^{ st }\) ચરણ
  3. C \(-7\) અને \(IV\) \(^{\text {th }}\) ચરણ
  4. D \(\frac{1}{7}\) અને \(I ^{ st }\) ચરણ
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Answer & Solution

Correct Answer

(A) \(-\frac{1}{7}\) અને \(IV\) \(^{\text {th }}\) ચરણ

Step-by-step Solution

Detailed explanation

\(\cot \alpha=1, \sec \beta=\frac{-5}{3}, \cos \beta=\frac{-3}{5}, \tan \beta=\frac{-4}{3}\) \(\tan (\alpha+\beta)=\frac{1-\frac{4}{3}}{1+\frac{4}{3} \times 1}=\frac{-1}{7}\)
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