Find the indefinite integral: ${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}si{n}^{2}xcosxdx$

$co{s}^{2}xsinxC$

$-co{s}^{2}xsinxC$

$-\frac{si{n}^{3}x}{3}C$

$\frac{si{n}^{3}x}{3}C$

Question $5$

Find the indefinite integral: ${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{3}{x^2-x-2}dx$

$ln|\frac{x-2}{x1}|C$

$ln|\frac{x-1}{x2}|C$