You start with a given set of rules and conditions and determine something to be true.

Step-by-step explanation:

do it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urselfdo it urself its very easy very very you will learn better if u try urself

thus, the first answer choice, y = sec x, is the correct one