作者FrankLP (台肯哥)
站内study
标题Re: [讨论] 关於微积分的公式
时间Mon Nov 8 13:35:22 2010
consider this triangle
/|
√(1+x^2) / | x
/ _|
/θ||
1
1 x
so, cosθ = --------- sinθ = --------- tanθ = x
√(1+x^2) √(1+x^2)
and then, use them to solve triangle integral problems.
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※ 编辑: FrankLP 来自: 222.76.206.114 (11/08 13:36)
1F：推 superconan:很实用！！ 11/09 15:08