Question
The angle of depression of a point on the ground as seen
from the top of a tower, 65 feet high, is 45°. Find the distance of the point on the ground from the foot of the tower.Solution
Let θ be the angle of depression of the point on the ground as seen from the top of a tower, here θ = 45° Let AC be the height of the tower, here AC = 65 feet. Let the distance of the point on the ground from the foot of the tower, AB = x feet. Here, tan θ = AC/AB ⇒ tan 45° = 65/x ⇒ 1 = 65/x ⇒ x = 65 feet
From which source is the purple dye known as litmus solution extracted?
Cinnabar is an ore of which metal?
The process of conversion of a solid directly into a gas is known as:
Which enzyme is responsible for converting complex starch into simple sugars?Â
What are antibiotics?
What is the compound used to in Nail polish remover?
Milk tastes sour when kept in the open for sometimes due to the formation of-
The Egg shell is made up of which of the following?
Which enzyme is responsible for converting triglycerides into fatty acids and glycerol?Â
Which of the following dyes is used for colouring Paper and typewriters?