Пошаговое объяснение:
формулы приведения в
cos(-43p\6)=cos(-6p-7p\6)=cos(-7p\6)=cos(7p\6)=cos(p+p/6)=-cos(p\6)=-√3\2
arccos(√3\2)=p/6
arcsin(sin(16p\3))=arcsin(sin(4p+4p\3))=arcsin(sin(p+p\3))=arcsin(-sin(p\3))=arcsin(-(√3\2))=-p\3
cos(-15p\8)=cos(-2p+p\8)=cos(p\8)
arccos(cos(p/8))=p\8
35*p\6\(-p\3+p\8)=-28
