Ответы и объяснения

2014-03-27T23:42:25+04:00
Y '=(1/2 *2sin4xcos4x)'=1/2*(sin8x)'=1/2cos8x* (8x)'=1/2 *8 *cos8x=4cos8x
y '(pi/12)=4*cos(8pi/12)=4*cos2pi/3)=4*cos(pi-pi/3)=4* (-cospi/3)=4* (-1/2)=-2