Mark the tick against the correct answer in the following:
The principal value of 
is
To Find: The Principle value of 
Let the principle value be given by x
Now, let x =
cos x =
cos x= - cos(
) (
)=
)
cos x=cos(
) (
))
x = 
1
Mark the tick against the correct answer in the following:
The principal value of is
To Find: The Principle value of
Let the principle value be given by x
Now, let x =
cos x =
cos x= - cos() ()=)
cos x=cos() ())
x =