英進舎予備校・進学センター英進舎 | 英進舎

— 2cosx sinx cosx = 3' (1) 3 (2) V = (1—2COSX + COS2X) dc — 2cosx + cos2x) dc (1 + 4cos2x + cos22x — 4cosx —4cosx cos2x +2cos2æ 3 27t = 27t = 27t o = 27t 27t • = 77t 2 1 COS 2C 1 COS —cos4x — 2 ——sin4x — 2cos3x + 4cos2x —sin 3x + 2sin 2x —4cosx —4. —(cos3x +cosx)+2cos2x dc —6cosx dc — 6sinx -1-—x ................
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