What is the value of sin ­7π/4c?

√(cosec2 -­ 1)/cosecA is equal to?

A quadrilateral is inscribed in a circle. If the opposite angles of the quadrilateral are equal and length of its adjacent sides are 6 cm and 8 cm, what is the area of the circle?

In an army selection process, the ratio of selected to unselected candidates was 6:1. If 30 less had applied and 10 less selected, the ratio of selected to unselected would have been 7:1. How many candidates had applied for the process?

A labourer can do a job in 50 hours. After 5 hours he takes a break. What fraction of the job is yet to be done?

Find measure of central angle of the sector whose perimeter is 25 cm and radius of the circle is 7 cm?

6.651 -­ (148.6 ­- x ) -­ 57.22 = 6.098. Find x.

Find two numbers whose sum is 29 and the product is 100.