vandame
Nov 12, 2006, 03:59 PM
how do u solve this problems
sin x + 2sinxcosx
tanx(tanx + 1)= 0
kyop
Nov 16, 2006, 10:23 PM
how do u solve this problems
sin x + 2sinxcosx
tanx(tanx + 1)= 0
You would utilize the trigonometric identities. My question is, are those two separate problems or just one? Please clarify the question and I can help better.
s_cianci
Nov 19, 2006, 06:11 PM
Yes, the first one sin x + 2sin x cos x appears to be incomplete. As for the second one, set each factor = 0:
tan x = 0 tan x + 1 = 0
tan x = -1
On the domain [0 , 2pi):
x = 0 , pi (generated by tan x = 0)
x = 3pi/4 , 7pi/4 (generated by tan x = -1)