What does a cultural historian study? a. the evolution of forms of government, political institutions, governmental relations, and political processes b. the development of art, manners, ceremonies, dress, and other aspects in a culture c. the changes in religious practice and beliefs over time d. the development of specific groups of people or of particular ways of organizing human life determine which statement is not correct. a. the range of the parent sine and cosine functions is . b. the coefficient of the cosine and sine functions affects the period of the functions. c. the period of the parent cosine and sine functions is . d. the domain of the parent cosine and sine functions is all real numbers.