What is the difference between the total sale of English newspapers and the total sale of Hindi newspapers in all the localities together.

The angle of elevation of the top of a tower, vertically erected in the middle of a paddy field, from two points on a horizontal line through the foot of the tower are given to be α and β (α>β). The height of the tower is h unit. A possible distance (in the same unit) between the points is

If the angle of elevation of the sun decreases from 45° to 30°, then the length of the shadow of a pillar increases by 60m. The height of the pillar is

An aeroplane flying horizontally at a height of 3 Km. above the ground is observed at a certain point on earth to subtend an angle of 60°. After 15 sec flight, its angle of elevation is changed to 30°. The speed of the aeroplane (taking √3 = 1.732) is

The value of 8(sin6θ + cos6θ) - 12(sin4θ + cos4θ) is equal to

If tan4θ + tan2θ = 1 then the value of cos4θ + cos2θ is

(1 + sec 20° + cot 70°)(1 - cosec 20° + tan70°) is equal to

If a2sec2x - b2tan2x = c2 then the value of sec2x + tan2x is equal to (assume b2 ≠ a2 )