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Mathematics 28 Online
OpenStudy (anonymous):

tg(45+a)-tg(45-a)=2tg(2a) (degree angle)

OpenStudy (loser66):

prove?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

i did the formula but now im stuck at (1+tga)/(1-tga) - (1-tga)/(1+tga)

OpenStudy (anonymous):

\[(1+tga)/(1-tga) - (1-tga)/(1+tga) = 2tg2a\]

OpenStudy (loser66):

OpenStudy (anonymous):

thx dude

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