The following Pie-chart shows the monthly expenditure of a family on various items. If the family spends Rs. 825 on clothing. Answer the question
What percent of the total income does the family save
The expression of Cot θ + Cosec θ – 1 / Cot θ +Cosec θ + 1 is equal to
A man on the top of a tower, standing on the sea-shore, finds that a boat coming towards him takes 10 minutes for the angle of depression to change from 300 to 600. How soon the boat reach the sea-shore
A vertical tower stands on a horizontal plane and is surmounted by a vertical flag staff of height h. At a point on the plane, the angle of elevation of the bottom of the flag staff is a and that of the top of the flag staff is β. Then the height of the tower is
From the top of a cliff 100 metre high, the angles of depression of the top and bottom of a tower are 450 and 600 respectively. The height of the tower is
If 2ycos θ = xsin θ and 2xsec θ - ycosec θ = 3, then the value of x2 + 4y2 is