Question

$\frac{1}{4}\cos^{4}x^{2} + c$

• A. $\cos^{4}x^{2} + c$
• B. $\int_{}^{}{\sec^{4}x\tan x\mspace{6mu} dx =}$
• C. $\frac{1}{4}\sec^{4}x + c$
• D. None of these

Answer 1

Answer: (A)

$\cos^{4}x^{2} + c$

Answer 2

$- \frac{1}{(1 + \tan x)^{2}} + c$

$\int_{}^{}\frac{e^{2x} - 1}{e^{2x} + 1}\mspace{6mu} dx =$.