1)sinпк+cos2пк=0+1=0
2)cos0-cos3п+cos3,5п=1-(-1)+0=2
3)sin(-п/2)+cosп/2=-1+0=-1
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1)sinпк+cos2пк=0+1=0
2)cos0-cos3п+cos3,5п=1-(-1)+0=2
3)sin(-п/2)+cosп/2=-1+0=-1