What is the reference angle for 640 degrees?

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What is the reference angle for 640 degrees?

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Answer 1 · 2015-04-30T17:48:26

It is always possible to add, or subtract, #360°# to an angle to obtain an equivalent one. The symbol #=# in the following passages is not a real #=#, but only an equivalent symbol.

#640°-360°=280°#.

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What is the reference angle for 640 degrees?

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