Question

5✓2* sin(3pi/8)* cos(3pi/8)
Помогите

Answer 1

$5 sqrt{2}sin frac{3 pi }{8} cosfrac{3 pi }{8}= frac{5 sqrt{2}}{2} sin frac{3 pi }{4} = frac{5 sqrt{2}}{2} sin( pi - frac{pi }{4}) =frac{5 sqrt{2}}{2} sinfrac{pi }{4}=frac{5 sqrt{2}}{2}* frac{ sqrt{2} }{2} =5$