# Yahoo奇摩 網頁搜尋

1. ### How to earn money by getting money by (--------------)?

Getting money by truck load is the only way to earn!!!

分類：社會及文化 > 語言 2020年08月05日

2. ### 數學嘅解同埋證明應該幾時寫？

...use it.) 2. Yes. At the minimum, in case of an incorrect answer, you still get some marks for correct solving.

分類：科學及數學 > 數學 2020年10月01日

3. ### 請問香港的covid-19密切接觸者定義是什麼？ 需要出處?

...officially defined "close contact (密切接觸者)". As officially as it gets , the following is a quasi-official definition, given it is...

分類：社會及文化 > 語言 2020年09月02日

4. ### how to show x = 1 / (1+2costheta)?

2021/01/13:  昨天看到你在回答區問的, 我就補充了. (1/2)tan(θ)(1+tan^2(θ/2))/(tan(θ)+tan(θ/2))       = (1/2)tan(θ)sec^2(θ/2)/(tan(θ)+tan(θ/2))        = (1/2)(1/cos^2(θ/2))/(1+tan(θ/2)/tan(θ))        = (1/2)/(cos^2(θ/2)+cos^2(θ/2)tan(θ/2)/tan(θ)) 請再看看還有哪裡寫得不夠清楚. ============================= 作 線段...

分類：科學及數學 > 數學 2021年01月13日

5. ### Define 和 Identify 有什麼分別？

... sides and angles, and so finding that it's got 4 equal sides and 4 right angles; ii) proving that a ...

6. ### Eng vocabulary ?

...的說法need a "friend"] (8) a rewarding task [好像後句太明顯的提示 get two rewards] (9)  [前後文cut了看不準] 只能從"an"估是一個a...

分類：社會及文化 > 語言 2020年07月29日

7. ### a triangle ABC, how to prove sin^2(A)-sin^2(B)=sin(A-B)sinC?

sin(A-B)sinC=sin(A-B)sin(A+B)=(sinAcosB-cosAsinB)(sinAcosB+cosAsinB) =sin^2Acos^2B-cos^2Asin^2B=sin^2Acos^2B-(1-sin^2A)(1-cos^2B) =sin...

分類：科學及數學 > 數學 2020年12月04日

8. ### How to learn knowledge well in university,and how to make a good academic racord?

... your own notes, but try to focus on the subject and do not get distracted. Try to write down the things the lecturers...

9. ### Trig question, what have I don't wrong? Solve (tan(2x)-tan(x))*(cos(3x)+cos(x))+2*cos(x)=2?

Question： Solve [tan(2x) - tan(x)][cos(3x) + cos(x)] + 2cos(x) = 2, 0 ≤ x ≤ π Solution： [tan(2x) - tan(x)][cos(3x) + cos(x)] + 2cos(x) = 2, 0 ≤ x ≤ π  ... sin x + cos x = 1 (sin x + cos x)² = 1 ...... [ It also implies (sin x + cos x)² = (-1)² ] ... x = 0, π...

分類：科學及數學 > 數學 2021年01月11日

1. ### 相關詞

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