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Effect of gyroscopic couple on rotating disc placed at certain angle?

Effect of Gyroscopic Couple on a disc fixed at a certain angle on a rotary shaft 

Let us discus about the effect of gyroscopic couple when the shaft contained with disc is rotating,   by consider a fixed disc on a rotating shaft  of mass "m", the angle made by the polar axis with respect to the disc is ''θ'' with respect to the shaft axis.
From front view we can absorve that the shaft rotates with angular velocity "ω" rad/s
The angular velocity of spin of disc about polar axis "op"= ω cos θ.