Question

3. If the line of sight and angle of elevation is given, then which trigonometric ratio
is used
(i) to find the height of the building
(ii) to find the distance from the foot of the building.​

Answer 1

Answer:

Iron metal is settling down at the bottom of the test tube. When ferrous sulphate is added to the iron-containing solution, then no change will be observed since metal is same, i.e. iron. So the green colour of FeSO4 disappears Fe metal is settling down at the bottom of the test tube. Hence the correct option is 4.