Maths
This question was asked in Ex 3.3, 10

 show that

sin [n+1] x cos [n+2]x +cos [ n+1] x cos [n+1]x.cos [n+2] =sin [x+y]. 

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ABI.R.M ABI.R.M
July 15, 2018, 12:23 p.m.

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