Trigonometric Functions And Equations

যদি \(0<\theta<\frac{\pi}{2}\) এবং \(\tan 3 \theta \neq 0\) হয়, তবে \(\tan \theta+\tan 2 \theta+\tan 3 \theta=0\) হবে, যদি \(\tan \theta \cdot \tan 2 \theta=\mathrm{k}\) হয়, যেখানে \(\mathrm{k}=\)