Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Show that
d
d
x
(
tan
3
x
x
)
=
3
x
sec
2
3
x
−
tan
3
x
x
2
\dfrac{d}{dx}\left(\dfrac{\tan 3x}{x}\right)=\dfrac{3x\sec^{2}3x-\tan 3x}{x^{2}}
d
x
d
(
x
tan
3
x
)
=
x
2
3
x
sec
2
3
x
−
tan
3
x
.
Browse the problem library