SOLUTION: Hi, I'm confused about solving for this trig equation: 3cos(x)+cos^2(x)+2=sin^2(x). I solved it and got three answers (pi, 2pi/3 and 4pi/3), but my answer sheet says 0 is also

Question 1181000: Hi,
I'm confused about solving for this trig equation: 3cos(x)+cos^2(x)+2=sin^2(x). I solved it and got three answers (pi, 2pi/3 and 4pi/3), but my answer sheet says 0 is also the answer. I'm not sure how to get 0 from the equation though.
Thanks for your help!

Answer by ikleyn(52817) (Show Source): You can put this solution on YOUR website!
.

The value of 0 (of zero) DEFINITELY is not the answer, as you can easily check by substituting
this value into the both sides of the given equation.

The answer sheet is DEFINITELY wrong in this part.

RELATED QUESTIONS
Hi, There's a parametric equations problem I'm confused about. The question is:... (answered by ikleyn)

Hi I have a question about solving trig equations: The equation 2tan^2x+10 tanx+12 can... (answered by Alan3354,stanbon)

Hi, I need some help with domain and range questions with trig. a) y=xsin^-1(x^2)... (answered by greenestamps)

Hi I am doing my calculus homework online and I am having problems swith this trig... (answered by reviewermath)

Hello,Can you please help me solve this problem: 1.Solve the following equation for x... (answered by Edwin McCravy)

hey, i am doing a exam review packet for my math class. i am having a ton of problems... (answered by user_dude2008)

Sin^-1 sqrt2/2 + Cos^-1 X= 2pi/3 Problems with evaluating inverse trig... (answered by Alan3354)

Ref # 1102550 ---------- cos(x) = 2 Solve for x. ------------- As an example from my (answered by rothauserc)

(2x/x^2-4)= (4/x^2-4) - (3/x+2) Hi, my name is Grace and I need help solving this... (answered by Fombitz)