Does the equation sin2 (x) - 4 = 0 have any solutions? Explain.

Isolate sin (x) by adding 4 and taking the square root of both sides.

State that sin (x) = 2 or sin (x) = - 2. State that - 2 and 2 are undefined values of the inverse sine function. There are no solutions because - 2 and 2 are not in the domain of the function.