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Mathematics
Mathematics
Problem
Show that:
sin
(
A
−
B
)
sin
(
A
+
B
)
=
tan
A
−
tan
B
tan
A
+
tan
B
\frac{\sin(A-B)}{\sin(A+B)} = \frac{\tan A - \tan B}{\tan A + \tan B}
s
i
n
(
A
+
B
)
s
i
n
(
A
−
B
)
=
t
a
n
A
+
t
a
n
B
t
a
n
A
−
t
a
n
B
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