Find the principal value of each of the following:
[
cos 
= 0 ]
We know that, for any x 
R, 
represent an angle in 
whose tangent is x.
Hence,
Principle value of 
is 0.
1
Find the principal value of each of the following:
[ cos = 0 ]
We know that, for any x R, represent an angle in whose tangent is x.
Hence,
Principle value of is 0.