(tg4α+tg3α)/(1-tg4α*tg3α)= tg(4α+3α)= tg7α
ответ: Г.) tg7α
(sin4a*cos3a+sin3a*cos4a)*cos3a*cos4a/(cos3a*cos4a-sin3a*cos4a)*cos3a*cos4a = sin4a*cos3a+sin3a*cos4a/cos3a*cos4a-sin3a*cos4a=tg7a
(tg4α+tg3α)/(1-tg4α*tg3α)= tg(4α+3α)= tg7α
ответ: Г.) tg7α
(sin4a*cos3a+sin3a*cos4a)*cos3a*cos4a/(cos3a*cos4a-sin3a*cos4a)*cos3a*cos4a = sin4a*cos3a+sin3a*cos4a/cos3a*cos4a-sin3a*cos4a=tg7a