Pls helppp bestiesss I’ll mark U brainliesttt

Next, chad created this graph with ordered pairs that show the possible ratios of the number of damage to defense cards in his deck.what error chad make?

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Which function is odd check all that apply a. y=sin x b. y=csc x c. y=cot x d. y=sec x