Book: RD Sharma - Mathematics (Volume 1)
Chapter: 4. Inverse Trigonometric Functions
Subject: Maths - Class 12th
Q. No. 3 of Exercise 4.3
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3
Evaluate each of the following:
Let 
Then tan x = 1 = 
……(i)
Let 
Then cos y = 
……(ii)
Again,
Let 
Then sin z = 
……(iii)
Now,
= 
[from (i), (ii), (iii)]
= 
= 
= 
