皮皮学，免费搜题
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【简答题】
Write an answer to one of the questions 2-4 in this part. Write 200-250 words on pages 5 and 6. (注：此处的页码为考试时答题卷的页码。) Write the question number in the box at the top of page 5. (注：此处的页码为考试时答题卷的页码。) For a joint programme you are working on with another team, your team will hold regular review sessions with them. You have been asked to write a follow-up email after the project initiation meeting yesterday. Write an email to Sherry Hong, head of the other team: — stating the purpose of the letter, — summarising the objectives of the review session identified at the meeting, — specifying the arrangement of the review sessions.
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【简答题】已知α是第三象限角，且 f(α)= sin(π-α)cos(2π-α)sin( 3π 2 -α)sin(α-π) cos(-α-π)sin(-π-α)cos( 3π 2 -α) （1）化简f（α）； （2）若 cos(α- 3π 2 )= 1 5 ，求f（α）的值； （3）若α=-1860°，求f（α）的值．