1.

What is \[\int{{{\sec }^{n}}x\tan xdx}\] equal to?

A. \[\frac{{{\sec }^{n}}x}{n}+c\]
B. \[\frac{{{\sec }^{n-1}}x}{n-1}+c\]
C. \[\frac{{{\tan }^{n}}x}{n}+c\]
D. \[\frac{{{\tan }^{n-1}}x}{n-1}+c\] Where ?c? is a constant of integration.
Answer» B. \[\frac{{{\sec }^{n-1}}x}{n-1}+c\]


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