1)ctg(π/2)+tgπ-sin(3π/2)-cos(-π/2)+sinπ=0+0-(-1)-cos(π/2)+0=1-0=1
2)sin(π/2)-cos(3π/2)+cosπ-tg0+ctg(3π/2)=1-0+(-1)-0+0=0
3)2sin(π/3)+2cos(π/4)-3tg(π/3)+ctg(π/2)=2(√3/2)+2(√2/2)-3√3+0=
=√3+√2-3√3=√2-2√3
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1)ctg(π/2)+tgπ-sin(3π/2)-cos(-π/2)+sinπ=0+0-(-1)-cos(π/2)+0=1-0=1
2)sin(π/2)-cos(3π/2)+cosπ-tg0+ctg(3π/2)=1-0+(-1)-0+0=0
3)2sin(π/3)+2cos(π/4)-3tg(π/3)+ctg(π/2)=2(√3/2)+2(√2/2)-3√3+0=
=√3+√2-3√3=√2-2√3