Evaluate the trigonometric function using its period as an aid. 
Definitions:
Chloride
A compound formed with chlorine and another element or group, commonly found in table salt (sodium chloride).
Magnesium Sulfate
A chemical compound, a salt with the formula MgSO4, often encountered as the heptahydrate sulfate mineral epsomite (commonly known as Epsom salt).
Sulfur
A nonmetallic chemical element with the symbol S and atomic number 16, known for its yellow crystalline appearance and importance in organic molecules.
Oxygen
A chemical element with symbol O and atomic number 8, critical for respiration in living organisms and combustion processes.
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