Quantitative Aptitude - Arithmetic Ability Questions

If x = a cosθ+ b sinθ and y = b cosθ- a sinθ, then x2 + y2 is equal to

If secA/√(sec2A ­- 1) = x, then value of x is

What is the value of tan 7π/4?

Simple interest on a certain sum of money for 3 years at 16% per annum is half the compound interest on Rs. 12000 for 2 years at 10% per annum. The sum placed on simple interest is

Calculate the simple interest if Rs. 1800 is invested for 10 years at a rate of 5% per annum.

If cosec∅+sin∅cosec∅-sin∅=53 then the value of sin∅is equal to

If (sinA + CosA)/(sin A - cos A) = 5/4, the value of (tan2A + 1)/(tan2A - 1) = ?

Which of the following equations has the sum of its roots as 11?