Which expressions are equivalent to tan(4theta)+tan(2theta) Check all that apply.(Multiple Choice)

Question

Which expressions are equivalent to tan(4theta)+tan(2theta)  Check all that apply.(Multiple Choice)

august899 · Answer

A. 2tan(6theta)tan(2theta) 
 
 B.2sin(6theta)/cos(6theta)+cos(2theta)  
 
 C.-2tan(3theta)tan(theta)  
 
 D.3tan(2theta)-tan^3(2theta)/1-tan^2(2theta)

august899 · Answer

@mathmale @loser66 @jim_thompson5910

mathmale · Answer

I can't walk you thru the whole problem solution, but can tell you that the "double angle formula for the tangent" would probablyl be very helpful here. I've done a quick Internet search and have come up with the following results: https://www.google.com/search?sourceid=chrome-psyapi2&ion=1&espv=2&ie=UTF-8&q=double%20angle%20formula%20for%20tangent&oq=double%20angle%20formula%20for%20tangent&aqs=chrome..69i57j0l5.8071j0j7

august899 · Answer

@sunnystrong

august899 · Answer

@loser66

august899 · Answer

@solomonZelman

loser66 · Answer

I think we did it.

august899 · Answer

Yes but I got it checked and it was wrong.