Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Problem
Problem
For every real number find all the real solutions to equation
sin
x
+
cos
(
a
+
x
)
+
cos
(
a
−
x
)
=
2
\sin x + \cos(a+x) + \cos(a-x) = 2
sin
x
+
cos
(
a
+
x
)
+
cos
(
a
−
x
)
=
2
.
Browse the problem library