Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
## Miscellaneous Exercise on Chapter 2 Prove that 6.
cos
−
1
12
13
+
sin
−
1
3
5
=
sin
−
1
56
65
\cos ^{-1} \frac{12}{13}+\sin ^{-1} \frac{3}{5}=\sin ^{-1} \frac{56}{65}
cos
−
1
13
12
+
sin
−
1
5
3
=
sin
−
1
65
56
Browse the problem library