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6 The co-ordinates of a moving particle at a time t, are5 cos 10t. The speed of thegive by, x 5 sin 10 t,yparticle is:

Answer»

speed in x direction is dx/dt = 5*cos(10)t.10 = 50cos(10)t

speed in y direction is dy/dt = 5*10*-sin(10)t

so , speed is = √50²cos²(10t)+50²sin²(10t) = 50√2.



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