Find a Formula for the Nth Term of the Sequence $0 , - 1,0,1,0 , - 1,0,1 ( 0 , - 1,0,1$

question 47

Multiple Choice

Find a formula for the nth term of the sequence.
- $0 , - 1,0,1,0 , - 1,0,1 ( 0 , - 1,0,1$ repeated)

• A) \(a _ { n } = \cos \left( \frac { \mathrm { n } \pi } { 2 } \right)\)
• B) \(a _ { n } = \sin ( n \pi )\)
• C) \(a _ { n } = \sin \left( \frac { \mathrm { n } \pi } { 2 } \right)\)
• D) \(a _ { n } = \cos ( n \pi )\)

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