t formula help (1 Viewer)

[kazemagic]

Hello, this is my first time coming across this type of question :/ How do you do question 3A? Thanks

 

[Fawun]

what the fuck is this? Are you like accelerating

 

[kazemagic]

what the fuck is this? Are you like accelerating

na just tutor work, cookies and cream ice cream up for grabs btw

 

[barbernator]

we know that tan(2A) = 2tanA/(1-tan^2(A)) from the trigonometric identities. Hence 3A = tan(20)

if you havent done these identities I will go into a further explanation

 

[kazemagic]

we know that tan(2A) = 2tanA/(1-tan^2(A)) from the trigonometric identities. Hence 3A = tan(20)

if you havent done these identities I will go into a further explanation

ive done those identities(compount identites rite?), but how does this relate to the t formula lol, idk how u got 3a=tan20 tho

 

[SpiralFlex]

 

[SpiralFlex]

Now go do the rest.

 

[barbernator]

Now go do the rest.

fix up line 2.

 

[Determined3]

a) if t=tan(A/2)= tan10 therefore eqn is 2t/1-t^2 = tanA = tan20

 

[kazemagic]

Oh i think i get it now thanks guize