Question

3 ctg 135+2 cos 120+tg 420+2sin306

Answer 1

3ctg(180-45)+2cos(180-60)+tg(360+60)+2sin(360-54)=-3ctg45-2cos60+tg60-2sin54=
-3*1-2*1/2+√3-2sin54=-3-1+√3-2sin54=-4+√3-2sin54