Quantitative Aptitude - Arithmetic Ability Questions

What is the value of (sinA -­ 2sin3A)/(2cos3A -­ cosA)?

What is the value of √[(1 - sinA)/(1 + sinA)]?

The value of tan 315° cot (­ -405° ) is equal to

The value of Cot17°Cot73°Cos222° + 1Cot17°Sec268° is

Find the curved surface area (in cm2) of a right circular cone of diameter 28 cm and slant height 12 cm.

What is the area (in sq cm) of a circle whose circumference is 22 cm?

A and B have their annual average income Rs. 80,000.
B and C have their annual average income Rs. 75,000.
C and A have their annual average income Rs. 78,000.

The annual income of A is ?

Sumit and Amit undertook a work for Rs 7200. Sumit alone can do the work in 5 days and Amit alone can do the work in 4 days. If they work together,then what will be the difference (in Rs.) in the amount they receive?