1) sin5α·cos2α= 2) cos6α·cos(-15α)= 3) sin3α·sin(-21α)= 4) sin+5α)·cos(3-3α)= 5) cos7α·cos(2+9α)= 1) 2sinαcos3α= 2)

Question

Алгебра: 1) sin5α·cos2α= 2) cos6α·cos(-15α)= 3) sin3α·sin(-21α)= 4) sin+5α)·cos(3-3α)= 5) cos7α·cos(2+9α)= 1) 2sinαcos3α= 2) 2cos2αcosα=

VasyaRaglinskiy66 · Answer

X^4+X^2-20 или же X^4-6X-27...

1) sin5α·cos2α= 2) cos6α·cos(-15α)= 3) sin3α·sin(-21α)= 4) sin+5α)·cos(3-3α)= 5) cos7α·cos(2+9α)= 1) 2sinαcos3α= 2) 2cos2αcosα=