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Mathematics
Mathematics
Problem
Without using a calculator, evaluate
sin
75
∘
cos
15
∘
+
cos
75
∘
sin
15
∘
\sin 75^{\circ}\cos 15^{\circ}+\cos 75^{\circ}\sin 15^{\circ}
sin
7
5
∘
cos
1
5
∘
+
cos
7
5
∘
sin
1
5
∘
.
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