`(i) int " x sec"^(2) " 2x dx "" "(ii) int " x sin"^(3) " x dx "`

1.	`(i) int " x sec"^(2) " 2x dx "" "(ii) int " x sin"^(3) " x dx "`
Answer» Correct Answer - `(i) (1)/(2) xtan 2x-(1)/(4) log\| sec 2x \|+c` `(ii) -(3)/(4) x cos x +(3)/(4) sin x +(1)/(12) x cos 3x -(1)/(36) sin 3x+c`

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