A particle is acted simultaneously by mutually perpendicular simple harmonic motions x=acosωt and y=asinωt. The trajectory of motion of the particle will be
A
an ellipse
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B
a parabola
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C
a circle
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D
a straight line
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Solution
The correct option is C a circle Given x=acosωt ......(i) y=asinωt ......(ii) Squaring and adding (i) and (ii), we get x2+y2=a2cos2ωt+a2sin2ωt=a2 It is an equation of circle. Thus, trajectory of motion will be circle.