已知向量m=（cosa,sina）和n=（根号2-sina,cosa）a属于（派,2派）且|m+n|=（8根2）/5,求cos(a/2+pai/8)

已知向量m=（cosa,sina）和n=（根号2-sina,cosa）a属于（派,2派）且|m+n|=（8根2）/5,求cos(a/2+pai/8)
已知向量m=（cosa,sina）和n=（根号2-sina,cosa）a属于（派,2派）且|m+n|=（8根2）/5,求cos(a/2+pai/8)

已知向量m=（cosa,sina）和n=（根号2-sina,cosa）a属于（派,2派）且|m+n|=（8根2）/5,求cos(a/2+pai/8)

如图

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Disclaimer: ActiveRain Corp. does not necessarily endorse the real estate agents, loan officers and brokers listed on this site. These real estate profiles, blogs and blog entries are provided here as a courtesy to our visitors to help them make an informed decision when buying or selling a house. ActiveRain Corp. takes no responsibility for the content in these profiles, that are written by the members of this community.
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Somewhere over the rainbow - Age 9 (My personal favorite)

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Britain and Susan Boyle have nothing on this girl!
Memory - Cats - Age 9
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Lucky Lang, SRES?, Davenport, Iowa Real Estate
She is quickly becoming America's Sweetheart!
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O Mio Babbino Caro - Age 8
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She reminds me a lot of Charlotte Church.

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Posted by Lucky Lang, SRES?, Davenport, Iowa Real Estate on 08/11/2010 01:00 AM Comments (0) Jackie Evancho in the ActiveRain Channel jackie evancho,coach handbags, singing sensation,mbt walking shoes, americas got talent, susan boyle, charlotte church, davenport iowa real estate, lucky lang Originally posted at: Davenport Iowa Real Estate: Jackie Evancho - A Child Star with a Bright Future! Post is included in group: Posts to Localism

America's Got Talent Audition - This was just recorded in June. She received more votes online than any other competitor!


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Panis Angelicus - Age 9

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I Will Always Love You - Age 10 on her birthday!
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Oh Holy Night - Age 8
US National Anthem - Age 9
Jackie Evancho catapulted her very young career tonight with her unbelievable performance on America's Got Talent!




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