Picture!! Pleassse answer fasttt! Branlist answer! Solving equations to find the angle measure angle measurement

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?

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. the douglas-fir is a conifer tree that grows in the taiga biome. it has an average height of about 70 feet, and its wood is an important source of lumber.

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?