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Im having trouble on these last 2 biology questions I have. Any help would be great. Thank You.? How do I use de Moivre's formula to evaluate (cos pi/7 + i sin pi/7) ^7 in cartesian form? Perform the operation and write it in standard form. (-8x) (8x +7)? Why do you need to use L'Hopital's Rule to find the limit below? limâ”¬( SO2 -> ? K2Cr2O7?