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∫sin(2x)dx
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Solution
−12cos(2x)+C
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타원형 초점
장축이 y축에 평행한 타원의 경우, Foci(포커스 포인트)는 다음과 같이 정의됩니다 (h,k+c),(h,k−c), 어디에c=√b2−a2중심으로부터의 거리이다 (h,k)초점을 맞추어