If secA - tanA = x, then the value of x is

A car travels a certain distance at 24 km/h and comes back at 36 km/h. Find the average speed for total journey.

If cos(A-B) - cos(A+B) = x, then the value of x is

When a number is increased by 28, it becomes 107% of itself. What is the number?

If sin - 4π/3 = x, then the value of x is

If the curved surface area of a right circular cone is 10010 sq cm and its slant height is 91 cm, find its total surface area.

The ratio of present ages of Ranjini and Shahid is 5:4. After 13 years the ratio of their ages will be 6:5. What is Ranjini's present age?

The diagonal of a square equals the side of an equilateral triangle. If the area of the square is 12 sq cm, what is the area of the equilateral triangle?