1) 0,3+sin^2п\6-cos^2п\3 и все поделить на 2sinп\6 2) 1,5- sin^2(-п\6)-cos^2(-п\6) поделить на 2cos(-п\4)

(0,3-Sin^2(П/6)-Cos^2(П/3))/2*Sin(П/6)=(0,3-(1/2)^2-(1/2)^2)/2*(1/2)=(0.3-0.25-0.25)/2*0.5=(0.3-0.25-0.25)/1=0.3-0.5=-0.2

1,5-Sin^2(-П/6)-(Cos^2(-П/6))/2*Cos(-П/4)=1,5-(1/2)^2-((-корень(3)/2)^2)/2*((-корень(3)/2))=1,5-0.25-((3/4)/-корень(3)=1,25+(3/4*1,73)=1,25+(3/6,92)=1,25+0,43=1,68