Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
If
(
tan
−
1
x
)
2
+
(
cot
−
1
x
)
2
=
5
π
2
8
(\tan^{-1} x)^2 + (\cot^{-1} x)^2 = \frac{5\pi^2}{8}
(
tan
−
1
x
)
2
+
(
cot
−
1
x
)
2
=
8
5
π
2
, then
x
x
x
equals (a) -1 (b) 1 (c) 0 (d) None of these
Browse the problem library