Quantitative Aptitude - Arithmetic Ability Questions

What is the value of (1 + cotA)2 + (1 -­ cotA)2?

3cosA is equal to

What is the value of x4+y4 when the value of x3+y3=8 and x+y=2 ?

What is the value of (cos 45 - 1/3) ?

If x + 3y - 2z4 = 6, x + 232y + 3z = 33 and 17x + y +z + 2z =9, then what is the value of 46x+ 131y ?

What is the area (in sq cm) of an equilateral triangle of side 14 cm?

The total surface area of a hemisphere is 462 sq cm, what is its curved surface area? (Take π = 22/7)

The base of a prism is in the shape of an equilateral triangle. If the perimeter of the base is 18 cm and the height of the prism is 20 cm, then what is the volume (in cm3) of the prism?