Find the best tutors and institutes for Class 12 Tuition
Search in
Find the value of 
We know that cos−1 (cos x) = x if
, which is the principal value branch of cos −1x.
Here,
Now, can be written as:
Find the value of 
We know that tan−1 (tan x) = x if
, which is the principal value branch of tan −1x.
Here,
Now, can be written as:
Solve
, then x is equal to
(A) 
(B) 
(C) 0 (D) 
Therefore, from equation (1), we have
Put x = sin y. Then, we have:
But, when
, it can be observed that:
is not the solution of the given equation.
Thus, x = 0.
Hence, the correct answer is C.
How helpful was it?
How can we Improve it?
Please tell us how it changed your life *
Please enter your feedback
UrbanPro.com helps you to connect with the best Class 12 Tuition in India. Post Your Requirement today and get connected.
Find best tutors for Class 12 Tuition Classes by posting a requirement.
Get started now, by booking a Free Demo Class
is equal to
(B) 
(C) 
(D) 
is equal to
(B). 
(C) 
(D) 
[Hint: putx = cos 2θ]
