Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Prove that
tan
(
x
+
π
)
=
tan
x
\tan(x+\pi)=\tan x
tan
(
x
+
π
)
=
tan
x
for every real
x
x
x
for which both sides are defined.
Browse the problem library