Prove cos (x - n) = -cOS X.
cos (x - 7) = cos x sin n - sin x cos n = -cos X
cos (x - n) = cos x cos n - sin x sin n = -cos X
cos (x - n = cos x sinn + sin x cos n = -cos X
cos (x - n) = cos x cos n + sin x sin n = -cos x

With finding limits of multi variable !

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is

Which of the following is closest to 32.9 x 7.5? a: 232 b: 259 c: 220 d: 265