Answer
$\tan45^{\circ}= 1$
Work Step by Step
$\tan\theta = \frac{\sin\theta}{\cos\theta}$
$\tan45^{\circ}= \frac{\sin45^{\circ}}{\cos45^{\circ}}$
Function Value for $\sin45^{\circ} = \cos45^{\circ} =\frac{\sqrt 2}{2} $
$\tan45^{\circ}=\frac{\frac{\sqrt 2}{2}}{\frac{\sqrt 2}{2}}= 1$
