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(cos (23pi/112) ) *(sin (pi/12))=?

Răspuns :

[tex]cos( \frac{23 \pi }{112} ) * sin( \frac{ \pi }{12} )= \frac{( \sqrt{3}-1)cos( \frac{23 \pi }{112}) }{2 \sqrt{2} } [/tex]