а)[tex]arcctg1-arctg \sqrt{3}-arccos(- \frac{1}{2}) [/tex]
b)[tex]arcsin(- \frac{1}{2})+arctg(- \frac{1}{\sqrt{3} } -arcctg \sqrt{3} [/tex]
c)[tex]arcsin(-1)- \frac{3}{2}arccos \frac{1}{2}+3arcctg(- \frac{1}{\sqrt{3} }) [/tex]
d)[tex]-4*arcsin( \frac{\sqrt{2} }{2}+8arccos( \frac{\sqrt{2} }{2} )-15*arctg \frac{\sqrt{3} }{3} [/tex]
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