 Welcome to the session. I am Deepika here. I am going to help you to solve the question. Find the principal value of cosecant inverse minus root 2. So, before doing this question, let's see the table. This table shows the domain and ranges. That is the principal value branch of inverse trigonometric function. And from this table, the range of the principal value branch of cosecant inverse is close interval minus pi by 2 to pi by 2 excluding 0. So, let's start the solution to y. Then think y is equal to minus root 2 equal to cosecant equal to cosecant of equal to minus root 2. Therefore, the principal value answer that is minus pi by 4 is the principal value of cosecant inverse minus root 2. So, I hope the question is clear to you. But enjoy yourself.