Someone help? Will mark brainiest if right!

What basic trigonometric identity would you use to verify that csc x sec x cot x = csc^(2)x

Which system of linear inequalities is represented by the graph? !

Assume that 1400 births are randomly selected and 1378 of the births are girls. use subjective judgment to describe the number of girls as significantly high, significantly low, or neither significantly low nor significantly high. choose the correct answer below. a. the number of girls is neither significantly low nor significantly high. b. the number of girls is significantly high. c. the number of girls is significantly low. d. it is impossible to make a judgment with the given information.