Principal solutions are ______
The solutions of a trigonometric equation which lie in the interval [0, 2π)
0 ≤ x < 2π are called principal solution.
For eg: sin x = 12, In the interval [0, 2π)
There exists two values of x for which sin x = 12
i.e π6 and 5π6 which lie in [ 0,2 π) &
Sinπ6=12
Sin5π6=12
Principal solutions of the equation sinx=12
are π6 & 5π6