Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
In Exercises 11-51, prove the identity. 38.
1
+
cos
x
1
−
cos
x
=
sec
x
+
1
sec
x
−
1
\frac{1+\cos x}{1-\cos x}=\frac{\sec x+1}{\sec x-1}
1
−
c
o
s
x
1
+
c
o
s
x
=
s
e
c
x
−
1
s
e
c
x
+
1
Browse the problem library