SOLUTION: 3cos^2a+2=3-2cosa

SOLUTION: 3cos^2a+2=3-2cosa

Algebra.Com

Question 593464: 3cos^2a+2=3-2cosa
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
3cos^2a+2=3-2cosa
3cos^2a+2cosa-1=0
(3cosa-1)(cosa+1)=0
..
3cosa-1=0
3cosa=1
cosa=1/3
a≈70.5�
or
cosa+1=0
cosa=-1
a=180�
RELATED QUESTIONS
sqrt(2+sqrt(2cos4A))=2cosA (answered by ikleyn)

Prove sqrt{[(1+cosA)^2]+[sinA]^2}=2cos(A/2) Sqrt{(1+(cosA)^2+2cosA+(sinA)^2... (answered by nagatheja3636)

2cosx^{2}+3cos=2 (answered by Alan3354)

y= 3cos(2 pix +... (answered by lwsshak3)

-3cos(pi/2 - X) =... (answered by ikleyn)

Express as a product sqrt(3)+2cosa I know formulas but not how to... (answered by Alan3354)

Solve {{{sin^2(x)}}} =... (answered by Edwin McCravy)

sen^2x+3cos^2x=3+rad3senx... (answered by Shin123)

cos^2(x)+3cos(x)-1=0 (answered by MathLover1)