Railways PYQCBT 1 2020

RRB NTPC · प्रश्न 85

यदि \(\sin \theta =\frac{3}{5}\) और \(\cos \theta =\frac{4}{5}\), तो \(\frac{1+\tan \theta}{1-\cot \theta}\) का मान है:

  1. \(\frac{11}{5}\)

  2. \(\frac{2}{5}\)

  3. \(\frac{-21}{4}\)

  4. \(\frac{-8}{5}\)

उत्तर देखें और व्याख्या

उत्तर: (C) \(\frac{-21}{4}\)

व्याख्या

tan θ = 3/4 and cot θ = 4/3. (1 + 3/4)/(1 − 4/3) = (7/4)/(−1/3) = −21/4.