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For Question, find (i) period and (ii) i...

For Question, find (i) period and (ii) initial phase
Hint `:` Period , `T = (2pi)/(omega)`, initial phase `= phi`
Compare given euation with `x = A cos ( omegat +phi)`

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Compare `x= 0.25 ( 6000 t + 0.85 ) ` with `x= A cos ( omega t + phi)`
(i) Period , `T= ( 2pi)/( omega ) = ( 2pi)/( 6000) s =( pi)/(3000) = 0.00105s`
(ii) Initial phase `, phi =0.85 rad`
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