Have you tried
anything at all? For example, have you looked at what happens if x= 1?
How did the "4" in the possibly un readable form become "6"?
sec 6x= 1/cos(6x) and tan(6x)= sin(6x)/cos(6x) so this is sin(6x)/cos^2(6x). Let u= cos 6x.
log(x(x+1)= 1
so you can find
easily and then
. Then use the trig identity [tex]tan(\theta)= \frac{2tan(\theta/2)}{1+ tan^2(\theta/2)}. (I actually used
and
to get a formula for
and then swapped
and
.
Find the tangent lines at x= 1 and find the angle between them. You might want to use the trig identity
. Again, I used the sum formulas for sine and cosine to get that formula.
. With
, what must
be?
And the "giggle" and "lipssealed" emoticons are to indicate that anyone giving you answers will be helping you cheat?
In future,
try yourself and show what you have tried.