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![[Post New]](/templates/default/images/icon_minipost_new.gif) 20 Feb 2008 22:30:50 IST
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find period of (sin x +sin 7x)/(cos x + cos 7x)
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20 Feb 2008 22:35:56 IST
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applying sinA+sinB formula
and cosA+cosB formula
we get given as tan4x
since period of tan is pi
period of tan4x is pi/4
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