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Problem #957

giải dùm em bài lượng giác

Added by khoa nguyễn [G] over 1 year ago. Updated about 1 year ago.

Status: Closed Start Date: 25-12-2011
Priority: Normal Due date:
Assigned to: tanphu % Done:


Category: Phương trình lượng giác
Target version: -
Votes: 1/1




Updated by khoa nguyễn [G] over 1 year ago

    khoa nguyễn [G] wrote:

    1)cos(sqr(3x)*cox(2x)-cos(sqr(x)=0 câu 2 sai đề, đề sửa là 2)(1+sin(sqr(x)))cosx+(1+cos(sqr(x)))*sinx=1+sin(2x)

    Updated by tanphu over 1 year ago

    • Project changed from Tấn Phú to Math Learning

    Updated by tanphu over 1 year ago

    • Category set to Phương trình lượng giác
    • Assigned to set to tanphu
    Em xem lại đề như thế này chính xác chưa?
    1. \(\cos \sqrt{3x}\cos 2x - \cos \sqrt{x}=0\)
    2. \( (1 + \sin \sqrt{x})\cos x+(1 + \cos \sqrt{x}) \sin x = 1 + \sin 2x\)

    Updated by tanphu about 1 year ago

    • Status changed from New to Closed