a maths 數學題 2(cos4θ)(cos2θ)

2008-01-09 3:53 am
Express the following as a sum or difference of sines and cosines.←咩意思?
2(cos4θ)(cos2θ)=?

Find th indefinite integral of the following equation:
│(3x^2+2) / (x^3+2x+2) dx
更新1:

請問第二題係根據甚麼公式做出黎?_?

更新2:

| 後面吾洗寫 dx?_?

更新3:

| 後面吾洗寫 dx?_?

回答 (1)

2008-01-09 4:55 am
✔ 最佳答案
The first question involves the usage of product to sum formula as follows:

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參考: My Maths knowledge


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