Trigonometry

Matthew Prey

New member
Joined
Jun 19, 2019
Messages
4
12796
12798

What the value 12797 = ?
 

Dr.Peterson

Elite Member
Joined
Nov 12, 2017
Messages
5,067
Have you tried applying the formula twice?

tg(4θ) = tg(2(2θ)), so you can replace θ with 2θ in the formula and simplify.
 

Jomo

Elite Member
Joined
Dec 30, 2014
Messages
4,078
Have you given us the whole problem?
 

Subhotosh Khan

Super Moderator
Staff member
Joined
Jun 18, 2007
Messages
19,094
Please follow the guidelines of posting in this forum enunciated at:


One of the most important rule is:

"Show some of your work or explain where you're stuck "

This is your 4th post- you ought to know better.

Hint: To start off:

Substitute Φ = 2*Θ

Then tg(4Θ) = tg(2Φ) ..... and continue.....
 
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