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arvind.b (146)

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Olaaa!! Perrrfect answer. 26  [34 rates]

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you can also do this by converting it into sin/sin form.

so cos 3x = -sin 3(pi/2-x)

cos 7x  = -sin 7(pi/2-x)

and it is easy to see that the limit as y goes to 0 of sin Ny/ sin My will be N/M




IIT Delhi 2001
Maths and Computing
Currently pursuing P.H.D in University of Pennsylvania
 this reply: 5 points  (with Olaaa!! Perrrfect answer.   in 1 votes )   [?]
 
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