1) 6sin90 - 3cos180 = 61 - 3(-1) = 6 + 3 = 9
2) cos120sin135ctg150 = cos(120)sin(135)ctg(150) =((-1/2)(√3/2)(1/tan(150))) =((-1/2)(√3/2)(1/√3)) =-1/4
1) 6sin90 - 3cos180 = 61 - 3(-1) = 6 + 3 = 9
2) cos120sin135ctg150 = cos(120)sin(135)ctg(150) =
((-1/2)(√3/2)(1/tan(150))) =
((-1/2)(√3/2)(1/√3)) =
-1/4