find the exact value or type \undefined\ tan 270°

Explanation:

Step1: Use the tangent formula

$\tan\theta=\frac{\sin\theta}{\cos\theta}$，so $\tan270^{\circ}=\frac{\sin270^{\circ}}{\cos270^{\circ}}$

Step2: Find the values of sine and cosine

We know that $\sin270^{\circ}=- 1$ and $\cos270^{\circ}=0$

Step3: Calculate the tangent value

Substitute the values into the formula: $\frac{-1}{0}$，division by zero is undefined.

Answer:

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