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Problem #930

phương trình lượng giác

Added by tanphu over 1 year ago. Updated over 1 year ago.

Status: New Start Date: 01-11-2011
Priority: Normal Due date:
Assigned to: - % Done:

0%

Category: -
Target version: -
Votes: 0/0

Description

giải phương trình:
9sin2x+6cos2x-3sin4x+cos4x=8

History

Updated by tanphu over 1 year ago

    Bài này biến đổi cho có thừa số chung (1-sin2x)