Book: RD Sharma - Mathematics (Volume 1)
Chapter: 4. Inverse Trigonometric Functions
Subject: Maths - Class 12th
Q. No. 1 of Exercise 4.3
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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.
