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OpenStudy (anonymous):
Find an exact value. tan 75°
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OpenStudy (anonymous):
3.732050807568877.......
OpenStudy (unklerhaukus):
notice that 75=30+45
OpenStudy (unklerhaukus):
\[\tan(u+v)=\frac{\tan(u)+\tan(v)}{1-\tan(u)\tan(v)}\]
OpenStudy (unklerhaukus):
you'll have to know [or be able to determine] the exact value of tan(30) and tan(45)
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