The trajectory of a projectile is y=x(1-x), where y and x are in metres.

Choose the correct option(s).

Comparing the given equation y=x(1-x) with standard equation of trajectory of a projectile $y=x\tan \alpha \left(1-\frac{x}{R}\right)$,

we see,

$$\begin{gathered} \tan \alpha =1 \text{and} R=1 \mathrm{m} \\ \therefore \alpha ={\tan }^{-1}1=\frac{\pi }{4} \end{gathered}$$