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What is the value of $\tan 45^{\circ}$?

A$0$
B$1$
C$\dfrac{1}{\sqrt{3}}$
D$\sqrt{3}$
Answer & Solution
Correct answer: B. $1$
$\tan 45^{\circ} = \dfrac{\sin 45^{\circ}}{\cos 45^{\circ}} = \dfrac{1/\sqrt{2}}{1/\sqrt{2}} = 1$.
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