Find a Formula for the Nth Term of the Sequence $a _ { n } = \sin ( n \pi )$

question 415

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

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