Why `Cot 0` Is Undefined In Trigonometry – Explained With Formulas

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The value of `cot 0` is undefined because the tangent of `0` is equal to `0`, and the cotangent is defined as the reciprocal of the tangent, so dividing by `0` is undefined. Alternatively, we can use the formula `cot(x) = cos(x) / sin(x)` which also leads to an undefined value since the sine of `0` is `0`.

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