- Thread starter
- Admin
- #1
- Feb 14, 2012
- 3,967
Find the smallest positive integer $k$ such that
$\tan k^{\circ}=\dfrac{\cos 2020^{\circ}+\sin 2020^{\circ}}{\cos 2020^{\circ}-\sin 2020^{\circ}}$
$\tan k^{\circ}=\dfrac{\cos 2020^{\circ}+\sin 2020^{\circ}}{\cos 2020^{\circ}-\sin 2020^{\circ}}$