5) sin(-29π)=-sin29π= -sin(24π+5π)= -sin(4π+5π)= -sin5π =-sin(π-π)=
6 6 6 6 6 6 6
=-sinπ = -1
6 2
6) cos35π=cos(32π+3π)=cos(8π+3π)=cos3π =cos(π-π)=-cosπ =-√2
4 4 4 4 4 4 4 2
7) tg 27π=tg(28π-π)=tg(7π-π)=tg(-π)=-tgπ = -1
4 4 4 4 4 4
8) ctg(-17π)= -ctg17π= -ctg(18π-π) = -ctg(6π-π)=-ctg(-π)=ctgπ =√3
3 3 3 3 3 3 3 3