Evaluate $\displaystyle\int{\frac{1}{{{(1+{{x}^{2}})}^{2}}}\,\mathrm{d}x}\,\,\,\,(\mathrm{let}\,\,x=

Question

Evaluate $\displaystyle\int{\frac{1}{{{(1+{{x}^{2}})}^{2}}}\,\mathrm{d}x}\,\,\,\,(\mathrm{let}\,\,x=\,	an \,	heta )$

Accepted Answer

½[x/(1+x²) + tan⁻¹x] + C

ACJC TUTORIAL 21 Q15