For the following questions answer them individually
If 2 cos θ = 2 - sin θ, then what is the value of cos θ?
If secA/(secA - 1) + secA/(secA + 1) = x, then x is
If x = 1 - y and $$x^2 = 2 - y^2$$, then what is the value of xy?
If 5x - (1/2)(2x -7) = 5.5, then what is the value of x?
A can do a work in 15 days and B in 20 days. If they work on it together for 5 days, then what fraction of work is left?