What is the square root of -16?
O-82
04
O 4
O 8i

How can we find the measure of an exterior angle if we know the measurement of an interior angle

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?

What is the standard form of -5x^2+2x^4-11+x^3+3x