L
loverain22


giải phương trình:
1) sin^3 x+cos^3 x =căn2/2
2) 4sin^3 x + sinx+cos x
3)( sin2x +2cos^2 x-1)/( cosx- sinx-cos3x+sin3x) = cosx
4) ( cotg^2 x - tg^2 x)/ cos2x = 32cos^2 2x
5) sin^2 x.tgx +cos^2 x.cotx = 1+tgx +cotx +sin2x
1) sin^3 x+cos^3 x =căn2/2
2) 4sin^3 x + sinx+cos x
3)( sin2x +2cos^2 x-1)/( cosx- sinx-cos3x+sin3x) = cosx
4) ( cotg^2 x - tg^2 x)/ cos2x = 32cos^2 2x
5) sin^2 x.tgx +cos^2 x.cotx = 1+tgx +cotx +sin2x