Question

if p and q are the lengths of the perpendicular from the origin to the straight lines xcosalpha+ycosecalpha=a and xcosalpha-ysinalpha=acos2alpha prove that 4p square+q square=a square

Answer 1

p and q are the lengths of the perpendicular from the origin to the straight lines xcosalpha+ycosecalpha=a and xcosalpha-ysinalpha=acos2alpha prove that 4p square+q square=a square