If x belong to [π/2 , π] then the value of (√(1+sinx))-(√(1-sinx)) is equal to:

A) 2cos(x/2)

B) 2sin(x/2)

C) 2

D) none of these.

the diameter of a roller is 84 cm and its length is 120 cm. it takes 500 complete revolution to  move once over to level a playground. find the area of the playground in square m?

Find dy/DX when y=x^sinx+sin-1√x.

 

Please give me the solution of this problem. 

Solve the differential equation y’’+2ty’-4y=1, y(0)=y’(0)=0.