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Prove sin2A*cos2A = sin2A-4sin^3A*cosA ? If a diploid cell has 38 chromosomes, how many homologous pairs does it have and why? On the geologic time scale, which division would encompass the SHORTEST period of time? How many dimensions would you measure to find out the size of a dishwasher? If you add a solution of CH3COOH to NaOH why is the initial moles of CH3COO- 0? Isn't there equilibrium within the CH3COOH solution?