Ialso need with this. it's really easy. i just need somebody to answer it cuz i'm not sure : )

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?

Evaluate the following expression 1/3^2

In what organelle does photosynthesis take place?