Posted by Alex on .
Having trouble verifying this identity...
cscxtanx + secx= 2cosx
This is what I've been trying
(1/sinx)(sinx/cosx) + secx = 2cosx
(1/cosx)+(1/cosx) = 2 cosx
2 secx = 2cosx
that's what i ended up with, but i know it's now right. did i mess up with the algebra?

Pre Calculus 
bobpursley,
Looks good. Lets try it with x=45deg
sqrt2*1+sqrt2=
2sqrt2 which is not equal to 2cos45 
Pre Calculus 
Alex,
Thanks!