Let I=\(∫^\frac{π}{2}_0\frac{sinx-cosx}{1+sinxcosxd}x........(1)\)
\(⇒I=∫^\frac{π}{2}_0\frac{sin(\frac{π}{2}-x)-cos(\frac{π}{2}-x)}{1+sin(\frac{π}{2}-x)cos(\frac{π}{2}-x)dx (∫a0ƒ(x)dx=∫a0ƒx)}dx)\)
\(⇒I=∫_0^{π}{2}\frac{cosx-sinx}{1+sinxcosx}dx...(2)\)
\(Adding(1)and(2),we obtain\)
\(2I=∫_0^\frac{π}{2}\frac{0}{1+sinxcosx}dx\)
\(⇒I=0\)
Arrange the following states in sequence (highest to lowest) according to their reserves of iron ore and choose the correct option.
I. Jharkhand
II. Karnataka
III. Chhattisgarh
IV. Odisha