Question

( 2+2 cos 80 )
( 2(1+cos theta theta)= )
( 4 cos ^{2} 4 theta )
( 2 sqrt{2+sqrt{2+2 cos ^{2} 4 theta}} )
( =sqrt{2+2 cos 2 theta} )
( 2 cos theta )
2
( frac{214 cos 0}{k=2} )

# 16. 0< V2+12+12+2 cos 80 =k cose=k= 224 38 40 16 1) 2

Solution