\[\int_{{}}^{{}}{\tan x}{{\sec }^{2}}x\sqrt{1-{{\tan }^{2}}x}\ dx=\]

1.	\[\int_{{}}^{{}}{\tan x}{{\sec }^{2}}x\sqrt{1-{{\tan }^{2}}x}\ dx=\]
A.	\[-\frac{1}{3}{{(1-{{\tan }^{2}}x)}^{3/2}}+c\]
B.	\[\frac{1}{3}{{(1-{{\tan }^{2}}x)}^{3/2}}+c\]
C.	\[-\frac{2}{3}{{(1-{{\tan }^{2}}x)}^{2/3}}+c\]
D.	None of these
Answer» B. \[\frac{1}{3}{{(1-{{\tan }^{2}}x)}^{3/2}}+c\]

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\[\int_{{}}^{{}}{\tan x}{{\sec }^{2}}x\sqrt{1-{{\tan }^{2}}x}\ dx=\]

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