1. 6sin30cos30/cos^2*30- sin^2*30 2.1-sin^2*60/2cos^2*60-1

Question

1. 6sin30cos30/cos^2*30- sin^2*30

2.1-sin^2*60/2cos^2*60-1

Answer 1

1) 3sin60/(cos^2 30-sin^2 30)=3*корень3

2)cos^2 60/cos^2 60 -1=-1