1.

intxSecx tanx dx=

Answer»

xSecx + log `| TAN ((PI)/(2) + (x)/(2) ) | + C `
xSecx - log `| tan ((pi)/(2) + (x)/(2) ) | + c `
xSecx - log `| tan ((pi)/(4) + (x)/(2) ) | + c `
xSecx + log `| tan "" (x)/(2) | + c `

ANSWER :C


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