Quantitative Aptitude - Arithmetic Ability Questions

If tanθ = 815, then 1-sinθ1+sinθ is

If a + b = 1, then a4 + b4 - a3 - b3 - 2a2b2 + ab is equal to

The marked price of a pen is Rs 3000. The shopkeeper gives two successive discounts of 15% and a% to the customer. If the customer pays Rs 2142 for the pen, then what is the value (in percentage) of a?

If (36 - 16x) - (4x - 8) = 4, then the value of x is

If x1x2x3 = 4(4 + x1 + x2 + x3 ), then what is the value of [1/(2 + x1 )] + [1/(2 + x2 )] + [1/(2 + x3 )]?

The value of sinθ+sin∅cosθ+cos∅ + cosθ-cos∅sinθ-sin∅ is

Divide Rs. 368 in the ratio 1:5:8:9. The rupees in the respective ratios are given by

The radius of the circle circumscribing the three vertices of an equilateral triangle is 12 cm. Determine the height (in cm) of the equilateral triangle