Question

5sinп/2+4cos0-3sin3п/2+cos
п

Answer 1

$5*1+4*1-3*(-1)+(-1)=5+4+3-1=11$

$sin(\frac{ \pi }{2})=1$
$cos(0)=1$
$sin(\frac{3 \pi }{2})=-1$
$cos( \pi)=-1$