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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: sin X + sin^2 X =1.then what is cos^8 X + cos^6 X + cos^4 x
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[Post New]17 Jul 2008 20:42:55 IST
    Subject: sin X + sin^2 X =1.then what is cos^8 X + cos^6 X + cos^4 x
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eswar.chidige (0)

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sin X + sin^2 X =1.then what is cos^8 X + cos^6 X + cos^4 x
    
[Post New]17 Jul 2008 21:35:33 IST
    Subject: sin X + sin^2 X =1.then what is cos^8 X + cos^6 X + cos^4 x
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RyuAmakusa (680)

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2sin^2 x

sinx +sin^2x=1 =>sinx =cos^2x
so cos^8 X + cos^6 X + cos^4 x =sin^2x(1+sinx + sin^2x) =2sin^2x
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[Post New]17 Jul 2008 22:43:18 IST
    Subject: Re:sin X + sin^2 X =1.then what is cos^8 X + cos^6 X + cos^4 x
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vnkt.swaroop (317)

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similarly try other and get the answer.
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