(Employers may not begin the Form I-9 process until an individual accepts an offer of employment.) Forms I-9 must be kept for three years after the date of hire or one year after the date of the employee's termination, whichever is later.
Sine qua non (/ËsaÉªni kweÉª ËnÉn/; Latin: [Ësine kwaË ËnoËn]) or conditio sine qua non (plural: conditiones sine quibus non) is an indispensable and essential action, condition, or ingredient.
In a right triangle, 1  the sine of a non-right angle equals the length of the leg opposite that angle divided by the length of the hypotenuse.  the cosine of a non-right angle equals the length of the leg adjacent to it divided by the length of the hypotenuse.