What is the period of the sinusoidal function?

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a sinusoidal function that begins at negative eleven comma two and decreases through negative ten comma zero until reaching a low point of negative nine comma negative two. the graph then increases through negative eight comma zero until it reaches a high point of negative seven comma two. the graph then decreases through negative six comma zero until it reaches a low point of negative five comma negative two. the graph then increases through negative four comma zero until it reaches a high point of negative three comma two. the graph then decreases through negative two comma zero until it reaches a low point of negative one comma negative two. the graph then increases through zero comma zero until it reaches a high point of one comma two. the graph then decreases through two comma zero until it reaches a low point of three comma negative two. the graph then increases through four comma zero until it reaches a high point of five comma two. the graph then decreases through six comma zero until it reaches a low point of seven comma negative two. the graph then increases through eight comma zero until it reaches a high point of nine comma two. the graph then decreases through ten comma zero until it reaches a low point of 11 comma negative two.