Question

a particle is moving in a horizontal circle with a speed v speed increase at constant rate than angle between velocity and acceleration​

Answer 1

Angle between speed and centripetal acceleration is 90 degrees

Angle between speed and tengential acceleration is 0 degrees…

Angle between net acceleration and speed will be variable…

Angle at an instant will be calculated by
Let “x” be angle between speed and net acceleration, therefore
At cos x = Ac sin x
At/Ac = tan x
X = tan inverse At/Ac