1 C is the vertical offset (height of the baseline). 2  P is the period or wavelength (the length of each cycle). 3  Ï is the angular frequency, and is given by. 4  Ï= 2Ï/ P or P = 2Ï/Ï.
President of Mexico. The President of the United Mexican States (Spanish: Presidente de los Estados Unidos Mexicanos) is the head of state and government of Mexico. Under the Constitution, the president is also the Supreme Commander of the Mexican armed forces. The current President is Enrique PeÃ±a Nieto, who took office on December 1, 2012.
The Americasâ First Black and Native President: Vicente Guerrero. Vicente Guerrero. For this Presidentâs Day in the United States, weâre honoring the first black president in the Americas. No, not Obama â this guy was Vicente RamÃ³n Guerrero SaldaÃ±a, the first black and indigenous president of Mexico. Known as the George Washington and the Abraham Lincoln of Mexico, Guerrero was a leading general in the Mexican War for Independence, and abolished slavery in 1829, forty years before Lincoln would do the same.