Sin6a+sin2a/cos6a+cos2a
УПРОСТИТЬ
(Sin6α+sin2α) / (cos6α+cos2α) =( 2sin(6α+2α)/2* cos(6α- 2α)/2 ) /
( 2cos(6α+2α)/2* cos(6α- 2α)/2 ) =sin4α*cos2α / cos4α*cos2α =tq4α.
Объяснение:
