Question

If tan A = 3/5 find tan 3A

Answer 1

\[ \tan 3A = \tan(A+2A)\]

Answer 2

http://www.goiit.com/posts/list/trignometry-how-to-find-the-valur-e-of-tan-3a-by-the-formula-924462.htm;jsessionid=7839919EAC4532E8E950EFCA9E48DA20.node2#977035

Answer 3

Therefore would tan A = -99/50 = -1.98 ?

Answer 4

just plugin the value of tanA on this formula
I haven't checked yet ... use wolfram alpha to verify it.

Answer 5

http://www.wolframalpha.com/input/?i=evaluate+tan%283x%29%2C+where+x%3Dtan^-1%283%2F5%29
verify your answer

Answer 6

http://www.goiit.com/equations/2009/4/11/ef648075-88cf-4ef2-8711-f35bc45cbbc1.png