BITSAT 2005 Solved Question Paper

Equation of parabola is
y2=−4x
∴ focus is (−1,0).
The equation of line passing through (−1,0) is
y−0=m(x+1) .......(i)
Since, the line makes an angle θ=120°
∴m=tan‌θ=tan‌120°
⇒m=−√3
On putting the value of m in Eq. (i), we get
y=−√3(x+1)