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Mathematics
Mathematics
Problem
If
sin
A
=
sin
B
\sin A = \sin B
sin
A
=
sin
B
and
cos
A
=
cos
B
\cos A = \cos B
cos
A
=
cos
B
, then
prove that
sin
A
−
B
2
=
0.
\text{prove that } \sin \frac{A-B}{2} = 0.
prove that
sin
2
A
−
B
=
0.
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