document.write( "Question 1143134: Evaluate the integral form 0 to pi/4 of sec^2(x)*e^(tanx) with respect to x, using the substitution u=tanx\r
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Algebra.Com's Answer #763907 by ikleyn(52841) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "The derivative of tan(x) is  sec^2(x).\r\n" );
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document.write( "Therefore, the integral from  0  to    of  , after substitution  u = tan(x) becomes\r\n" );
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document.write( "the integral from  0  to  1  of  .\r\n" );
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document.write( "The last integral is   = e - 1.    ANSWER.\r\n" );
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document.write( "The correct answer  is  e-1.\r\n" );
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