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1.
If 
Then, the value of 
is
Then, the value of is
2.
is equal to
is equal to
3.
If 
are the angles of a triangle, then the value of
is
are the angles of a triangle, then the value of is
4.
The value of the determinant
is
is
5.
If one root of determinant
is
then the other two roots are
isthen the other two roots are