A projectile is projected at an angle ø(>45o ) with an initial velocity u. the time t at which its horizontal component will equal the vertical component in magnitude is:-
a) t=u/g(cosø-sinø). b) t=u/g(cosø+sinø).
c) t=u/g(sinø-cosø). d) t=u/g(sin2ø-cos2ø).