Question

Ex 6 va rog daca stie cnva

Answer 1

$sin \frac{ \pi }{8}cos \frac{ \pi }{8}= \frac{1}{2}(2sin \frac{ \pi }{8}*cos \frac{ \pi }{8})= \frac{1}{2}*sin \frac{ \pi }{4}= \frac{1}{2}* \frac{ \sqrt{2} }{2}= \frac{ \sqrt{2} }{4}$. S-a folosit formula : 2sinx*cosx=sin2x.