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The following command produces an error.
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In the following case, radical expressions exist, but viewed as functions of x none of them is equal to the .
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In general, there is no radical expression for the roots of a degree polynomial.
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The following represents a seventh root of unity. It cannot be expressed in radical form, but it can be converted to a form involving trigonometric functions.
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Trigonometric functions of a rational multiplied by Pi can, in some cases, be converted to radical form.
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| (16) |