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Problem
## Miscellaneous Exercise on Chapter 2 Prove that 7.
tan
−
1
63
16
=
sin
−
1
5
13
+
cos
−
1
3
5
\tan ^{-1} \frac{63}{16}=\sin ^{-1} \frac{5}{13}+\cos ^{-1} \frac{3}{5}
tan
−
1
16
63
=
sin
−
1
13
5
+
cos
−
1
5
3
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