MCQ
જો $3\tan^{-1}x+\cot^{-1}x=\pi$ હોય તો $x=......$
- A5
- ✓1
- C4
- D3
$\therefore3\ \tan^{-1}x+\cot^{-1}x=\pi$
$\therefore2\tan^{-1}x+\tan^{-1}x+\cot^{-1}x=\pi$
$\therefore2\tan^{-1}x+\frac{\pi}{2}=\pi\ \ \ (\because$ કોટી સંખ્યાના સૂત્ર મુજબ)
$\therefore2\tan^{-1}x=\frac{\pi}{2}$
$\therefore \tan^{-1}x=\frac{\pi}{4}$
$\therefore x=\tan\frac{\pi}{4}$
$\therefore x=1$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.