Qs need help. (1 Viewer)

[ToO LaZy ^*]

*EDITED*

*adds reps to CM and grey*

 

[ToO LaZy ^*]

uh, wtf! I deleted taht post cause I thought it was so stupid.

crap, you saw it. can you delete the quote? I shouldn't have asked, its just sad helping people for reps. :-\

hahah..yep, caught your post in the nick of time ..
nah it's ok, you deserve reps.
and since i quoted you again, you look even more stupid .lol

 

[ToO LaZy ^*]

ok..i'll delete your quote

 

[ToO LaZy ^*]

another question...

tan(3tan^-1x)

 

[shafqat]

Solution

Let a = tan-1x
Then tan a = x
So tan(tan-1x) = tan 3a
= 3x - x3 / 1 - x2
(tan3a formula)

 

[ToO LaZy ^*]

Let a = tan-1x
Then tan a = x
So tan(tan-1x) = tan 3a
= 3x - x3 / 1 - x2
(tan3a formula)

ohk..but should'nt it be
3x - x³ / 1 - 3x²?