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Mathematics
Mathematics
Problem
Show that
sin
75
∘
cos
15
∘
−
cos
75
∘
sin
15
∘
=
3
2
\sin 75^\circ\cos 15^\circ - \cos 75^\circ\sin 15^\circ = \dfrac{\sqrt3}{2}
sin
7
5
∘
cos
1
5
∘
−
cos
7
5
∘
sin
1
5
∘
=
2
3
.
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