Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Calculate the exact value of
cos
(
7
π
12
)
\cos\bigl(\tfrac{7\pi}{12}\bigr)
cos
(
12
7
π
)
.
Browse the problem library