1.

Find the value of ∫tan-1⁡(x)dx

A. sec<sup>-1</sup> (x) – <sup>1</sup>⁄<sub>2</sub> ln⁡(1 + x<sup>2</sup>)
B. xtan<sup>-1</sup> (x) – <sup>1</sup>⁄<sub>2</sub> ln⁡(1 + x<sup>2</sup>)
C. xsec<sup>-1</sup> (x) – <sup>1</sup>⁄<sub>2</sub> ln⁡(1 + x<sup>2</sup>)
D. tan<sup>-1</sup> (x) – <sup>1</sup>⁄<sub>2</sub> ln⁡(1 + x<sup>2</sup>)
Answer» C. xsec<sup>-1</sup> (x) ‚Äö√Ñ√∂‚àö√ë‚àö¬® <sup>1</sup>‚Äö√Ñ√∂‚àö√ñ‚àö√´<sub>2</sub> ln‚Äö√Ñ√∂‚àö√ñ¬¨‚àû(1 + x<sup>2</sup>)


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