Equations Solving problems: x + x + 1= 43 2x +1 -1 = 43 – 1 2x = 42 2 2 Solution: x = 21.
s3-ap-southeast-1.amazonaws.com · Nghiêm cua phuŒng trinh sin 2x + cos 2x = 1 , la: A. x = k2z =...
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