Express tan3x in terms of tanx.  TOPIC_SOLVED

Trigonometric ratios and functions, the unit circle, inverse trig functions, identities, trig graphs, etc.

Express tan3x in terms of tanx.

Postby marty.frmn on Sun Oct 25, 2009 7:29 pm

Express tan3x in terms of tanx....
Answer: tanx(3-tan^2x) / 1-3tan^2x
i have used it like sin3x/cos3x and then i use the formula for both.... but then i get stuck in between....
marty.frmn
 
Posts: 18
Joined: Mon Oct 05, 2009 7:54 pm

Sponsor

Sponsor
 

  TOPIC_SOLVED

Postby stapel_eliz on Mon Oct 26, 2009 12:09 am

I think you might want to try using a summation formula...? Re-state tan(3x) as tan(x + 2x), and see where that leads.
User avatar
stapel_eliz
 
Posts: 1716
Joined: Mon Dec 08, 2008 4:22 pm


Return to Trigonometry

cron