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45gaody mobi(epub转换mobi软件)

时间:2010-12-5 17:23:32  作者:国际新闻   来源:国际新闻  查看:  评论:0
内容摘要:y=Θ*sinΘ+½cosΘ,求dy/dΘ,Θ=45°y= θsinθ +(1/2)cosθ dy/dθ =θcosθ+sinθ -(1/2)sinθ dy/dθ|θ=π/4 =(π/4)(√

y=Θ*sinΘ+½cosΘ,求dy/dΘ,Θ=45°y= θsinθ +(1/2)cosθ dy/dθ =θcosθ+sinθ -(1/2)sinθ dy/dθ|θ=π/4 =(π/4)(√2/2) + (1/2)(√2/2) =(√2/2) ( π/4 + 1/2)
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