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Mathematics
Problem
The value of the expression
1
−
4
sin
10
∘
sin
70
∘
2
sin
10
∘
\frac{1-4\sin 10^\circ \sin 70^\circ}{2\sin 10^\circ}
2
s
i
n
1
0
∘
1
−
4
s
i
n
1
0
∘
s
i
n
7
0
∘
is (a) 1 (b) 2 (c)
3
\sqrt{3}
3
(d)
3
2
\frac{\sqrt{3}}{2}
2
3
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