Paper 4 October/November 2009 MATHEMATICS (9709/42) A Levels
لطفا برای اطمینان از عملکرد و تجربه بهتر از مرورگرهای مدرن و به روز مانند کروم یا فایرفاکس استفاده کنید.

A particle $P$ is projected from a point $O$ with initial speed $10{\text{ }}m{\text{ }}{s^{ - 1}}$ at an angle of ${45^ \circ }$ above the horizontal. $P$ subsequently passes through the point $A$ which is at an angle of elevation of ${30^ \circ }$ from $O$ (see diagram). At time $t\,s$ after projection the horizontal and vertically upward displacements of $P$ from $O$ are $x$ m and $y{\text{ }}m$ respectively.
a) Write down expressions for $x$ and $y$ in terms of…