sunset220505 sunset220505 13-09-2021 Mathematics contestada a) cos(2x- pi/3)= 1/ căn 3 b) ( 2sinx-3 ). cos 2x=0 c) sin 3x.( 5cosx+6)=0 d) 3sin2x- 5cos=0 e) 4sinxcosx.cos2x=-1
