what is the 'ILATE' RULE Share with your friends Share 130 Lalit Mehra answered this Hi! Here is the answer to your query. x being an algebraic function comes first in the list than cos x which is a trigonometric function. Cheers! 147 View Full Answer Rohit answered this ILATE rule is used for the simplicity of performing Integration BY PARTSIn this we take two functions, giving one of them the higher priority. to avoid the confusion so as to which should be taken we use this rule.Where..I --> InverseL --> lograthemicA --> AlgebraicT --> TriginometricE --> Exponential for ex : ∫ x Sinx dxhere we take x as the first fn and Sinx as second and then proceed. 14