Which statement is true about angles three and six

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers