Question

$\sin x - \frac{2}{3}\sin^{3}x + \frac{1}{5}\sin^{5}x + c$

• A. $\sin x + \frac{2}{3}\sin^{3}x + \frac{1}{5}\sin^{5}x + c$
• B. $\sin x - \frac{2}{3}\sin^{3}x - \frac{1}{5}\sin^{5}x + c$
• C. $\int_{}^{}{\sec x\tan^{3}x\mspace{6mu} dx =}$
• D. None of these

Answer 1

Answer: (A)

$\sin x + \frac{2}{3}\sin^{3}x + \frac{1}{5}\sin^{5}x + c$

Answer 2

Put $\frac{1}{6}\log\lbrack\sec 6x + \tan 6x\rbrack + c$ then

$\log\lbrack\sec 6x + \tan 6x\rbrack + c$