SOLUTION: I need to find the exact value of tan40�-tan10�/1+tan40�tan10� The problem obviously has something to do with sum & difference identities but I have no idea what to do with it.

Question 731805: I need to find the exact value of tan40�-tan10�/1+tan40�tan10�
The problem obviously has something to do with sum & difference identities but I have no idea what to do with it.
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
I need to find the exact value of tan40�-tan10�/1+tan40�tan10�
Identity: tan(s-t)=(tan s-tan t)/(1+tan s*tan t)
tan40�-tan10�/1+tan40�tan10�=tan(40�-10�)=tan30�=√3/3
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