MCQ
સમીકરણ $\, 2tan\theta \, -\, cot\theta =\, -1$ નો વ્યાપક ઉકેલ મેળવો
- A$n\pi $
- ✓$n\pi \,-\, \pi /4$
- C$n\pi \,+\, \pi /4$
- Dએક પણ નહી
$2 \tan ^{2} \theta+\tan \theta-1 =0$
$(2 \tan \theta-1)(\tan \theta+1) =0$
$\tan \theta =-1 $
$\theta= n \pi-\pi / 4$
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