4cos^2 x+2+4sin^2x.=
= 4(cos²х+sin²x)+2 =4*1+2=6
<em><span>1)23/10=2,3</span></em>
<em><span>2)851/100=8,51</span></em>
<em><span>3)5273/1000=5,273</span></em>
<em><span>4)3636/100=36,36</span></em>
<em><span>5)9132/1000=9,132</span></em>
<em><span>6)654321/10000=65,4321</span></em>