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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: MAY BE EASY 4 U ALL
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[Post New]3 May 2008 06:15:34 IST
    Subject: MAY BE EASY 4 U ALL
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ADPDAVCTC (5)

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MAY BE EASY 4 U ALL
    
[Post New]3 May 2008 06:17:00 IST
    Subject: MAY BE EASY 4 U ALL
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ADPDAVCTC (5)

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tan( cot x) = cot ( tan x ) . THEN sin 2x =?
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[Post New]3 May 2008 06:43:48 IST
    Subject: Re:MAY BE EASY 4 U ALL
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seraphic (123)

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is it 4/
* "A Wish will not change anything, however a Decision will change everything"
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[Post New]3 May 2008 08:43:55 IST
    Subject: Re:MAY BE EASY 4 U ALL
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anchitsaini (4249)

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\tan (\cot x)= \tan (\frac{\pi}{2} - \tan x) \\ \\<br/>or \\ \\<br/>\cot x = n\pi + \frac{\pi}{2} - \tan x \\ \\<br/>\tan x + \cot x = \frac{2n\pi + \pi}{2} \\ \\<br/>\frac{1}{\sin x \cos x}=(2n+1)\frac{\pi}{2} \\ \\<br/>or \\ \\<br/>\sin x \cos x=\frac{2}{(2n+1)\pi } \\ \\<br/>hence \\ \\<br/>\sin 2x=\frac{4}{(2n+1)\pi }
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