Concept Overview
Trigonometric equations often have more than one answer.
This happens because trigonometric functions repeat their values.
General solutions describe all possible answers in a clear pattern.
A principal solution is one main solution found first.
Sine, cosine, and tangent repeat values after fixed intervals.
Because of this repetition, equations such as sin have infinitely many solutions unless an interval is given.
A general solution uses an integer to represent all repeated answers.