КАК РЕШИТЬ, ХЕЕЕЛП (sin 30' + cos 30')^2- tg 30' ( ' -градус)
(sin30°+cos30°)²-tg30°=sin²30°+2.sin30°.cos²30°+cos²30°-tg30°= =(sin²30°+cos²30°)+(2.sin30°.cos30°)-tg30°= =1+sin(2.30°)-tg30°=1+sin60°-tg30°=1+√3/2-√3/3= =1+(3.√3-2.√3)/6=1+√3/6