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OpenStudy (anonymous):
use a sum or difference identity to find the exact vale of tan165 degrees
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OpenStudy (anonymous):
\[165=120+45\] use those
OpenStudy (anonymous):
i did but i got down to the end of the equation but it doesn't make any sense to me
OpenStudy (mathmate):
Then try 165=180+(30-45) knowing that the tangent function has a period of 180 degrees.
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