Solve: −9d−8−−−−−−−√−d=0. If there are multiple solutions, list them separated by a comma, e. g., 1,2. If there is no real solution, enter ∅.

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?

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

Add the fractions and simplify 1/2+ 1/3