Question

3ctg60(sin310cos70-sin70cos310)

Answer 1

3ctg60(sin310cos70-sin70cos310) =

3ctg60(sin(310-70)=

3ctg60* sin 240=

3ctg60* sin(180+60)=

3ctg60* sin60=

3*√3/3*√3/2=

3*3/6=

3/2=

1,5