×

KenCheng

Prove

請問這題點算?

附加文件

解答 0

  • eric
    2019-05-11 10:23:07
    =cosθ+(cosθ)^2×sinθ/cosθ
    =cosθ+cosθsinθ
    Simply RHS also and you will see LHS=RHS
  • KenCheng
    2019-05-11 10:33:34
    I can't see LHS=RHS

    附加文件

    •  eric 2019-05-11 10:23:07
    • =cosθ+(cosθ)^2×sinθ/cosθ =cosθ+cosθsinθ Simply RHS also and you will see LHS=RHS
  • eric
    2019-05-11 10:41:44
    The third step of RHS is wrong and it should be:
    =(sinθ+(sinθ)^2)÷(sinθ/cosθ)
    =(sinθ+(sinθ)^2)×cosθ/sinθ
    Then expand further to get the match
    •  KenCheng 2019-05-11 10:33:34
    • I can't see LHS=RHS
  • eric
    2019-05-11 10:44:32
    Simply --> Simplify
    •  eric 2019-05-11 10:23:07
    • =cosθ+(cosθ)^2×sinθ/cosθ =cosθ+cosθsinθ Simply RHS also and you will see LHS=RHS
  • eric
    2019-05-11 10:46:14
    Simply → Simplify
    •  eric 2019-05-11 10:44:32
    • Simply --> Simplify
請填寫內容
請輸入你的答案
上載文件更改 ×
檔案過大
不支援此檔案
jpg, gif, png, doc, docx, pdf, xls, mov, mp4, m4a, mp3 (檔案上限為50M)