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  1. 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

  2. ... in writing report speech, such as using passive voice instead of active voice.

    分類:社會及文化 > 語言 2020年07月29日

  3. The only way is to re-install via factory restore partition or USB flash drive. Note - upgrade option must be done within the Windows system it is trying to upgrade. So what you see is normal.

  4. ... should have study with him to teach him how to do the homework instead of just letting him copy the answers. Now, I feel...

    分類:社會及文化 > 語言 2018年11月13日

  5. ... this noon ? Could is not used , except in conditional. Instead , be able to, manage to, succeed in doing something are preferred...

    分類:社會及文化 > 語言 2018年07月26日

  6. You have made a refund of $xxx to my other credit card (no. xxx) instead of the one (no. xxxx) as requested by me. (What has...

    分類:社會及文化 > 語言 2017年11月01日

  7. ... word is normally used as the plural of "person," instead of "persons."你的意思是這樣嗎?範圍有這麼大嗎?與其相對...

    分類:社會及文化 > 語言 2017年06月13日

  8. ... similar to the bass drum, only you use the very front of your lips instead of the side, and you tighten them more. Pull your lips...

    分類:電視 > 其他 - 電視 2017年06月06日