trigonometry

May 2010
2
0
Hi, i am sruggaling to solve this one out, please help if you can(Worried)
tg2^@+ctg2^@, if tg@+ctg@=3
 
Sep 2008
1,261
539
West Malaysia
Hi, i am sruggaling to solve this one out, please help if you can(Worried)
tg2^@+ctg2^@, if tg@+ctg@=3
try squarring

(tan @+cot @)^2=(3)^2

and see what you can get from here .
 
May 2010
2
0
Thanks, I hope that is it, i don't really have any other options whatsoever(Itwasntme)
and i have another one I can not quite understand
sin2x+cosx=0
and 2sinx - cos2^x - 2=0 (Headbang)
 

skeeter

MHF Helper
Jun 2008
16,216
6,764
North Texas
Thanks, I hope that is it, i don't really have any other options whatsoever(Itwasntme)
and i have another one I can not quite understand
sin2x+cosx=0
and 2sinx - cos2^x - 2=0 (Headbang)
\(\displaystyle \sin(2x) = 2\sin{x}\cos{x}\) ... substitute, factor, and solve.

\(\displaystyle \cos^2{x} = 1 - \sin^2{x}\) ... again, substitute, factor, and solve.