Use a calculator to solve for ∅ in the given interval. cot=0.7615, for 0<∅<2π

1/2(2*4)=6 $$- agahajakanajak

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.