a particle is projected with a velocity u at an angle theta with the horizontal at any instant its velocity - Physics - Motion in a plane

Question

a particle is projected with a velocity u at an angle theta with
the horizontal at any instant its velocity v is at right angles to
it's initial velocity u then v is:-
a u cos theta b u tan theta c u cot theta d u sec theta

I want answer with full solution

Ved Prakash Lakhera · Accepted Answer

When projectile is projected with velocity U and it aquires velocity V when projectile makes angle 90° with the direction of of velocity U
HORIZONTAL velocity of projectile= U cosθ
horizontal velocitywhen projectile makes an angle of 90° with the direction of velocityU is given by V cos90-θ as shown in the diagram
But horizontal velocities of projectile motion remain the same i
 e
U cosθ =V cos90-θ     or   U cosθ =V sinθ         or      V= U cotθ

a particle is projected with a velocity u at an angle theta with the horizontal at any instant its velocity v is at right angles to it's initial velocity u then v is:- a. u cos theta b. u tan theta c. u cot theta d. u sec theta I want answer with full solution.

a particle is projected with a velocity u at an angle theta with the horizontal at any instant its velocity v is at right angles to it's initial velocity u then v is:-
a. u cos theta b. u tan theta c. u cot theta d. u sec theta

I want answer with full solution.