SOLUTION: cos(-1380)

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Question 695869: cos(-1380)
Found 2 solutions by Alan3354, mouk:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
cos(-1380)
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Do you have a calculator?

Answer by mouk(232) About Me  (Show Source):
You can put this solution on YOUR website!
The cosine function has period +360%5E0+
So +cos%28x%2Bn%2A360%5E0+%29+=+cos%28x%29+


So we can write as follows: