sin^2 24+sin^2 66÷cos^2 24+cos^2 66+sin^2 61 +cos61 sin29

sin(90-66)=cos66 sin^2(90-66)+sin^266=1 cos^2(90-66)+cos^266=1 1/1=1 sin^261+[cos61*sin(90-61)]=sin^2(61)+cos^2(61) =1 1+1=2