$4 \,\,sin5^o \,\,sin55^o \,\,sin65^o$ has the values equal to
$4 \,\,sin5^o \,\,sin55^o \,\,sin65^o$ has the values equal to
- A
$\frac{{\sqrt 3 + 1}}{{2\sqrt 2 }}$
- B
$\frac{{\sqrt 3 - 1}}{{2\sqrt 2 }}$
- C
$\frac{{\sqrt 3 - 1}}{{\sqrt 2 }}$
- D
$\frac{{3\left( {\sqrt 3 - 1} \right)}}{{2\sqrt 2 }}$
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