If observed frequencies are 5,10,15 and expected frequencies are each equal to 10 then chi square value is

Write an explicit formula that represents the sequence defined by the following recursive formula:

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15