Re: [討論] 關於微積分的公式

[FrankLP (台肯哥)]

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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※ 編輯: FrankLP         來自: 222.76.206.114       (11/08 13:36)
推 superconan:很實用！！