9. Show that each statement is an identity. You may use a graph to check but must give other reasons for credit. 1+ sin x (a) 1+ csc x (b) tan x sec x sin (x + y) + sin (x – y) = 2 sin x cos y 10.Rewrite so that none of the exponents are greater than 1: sin'x 4 COS X 11.Use an addition or subtraction formula to find the exact value for cos (75°). Write your answer as a single fraction in simplest form. No need to rationalize the denominator. 12. Suppose sin x = - % and 180°

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Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.