SOLUTION: If cos(x)=-1/3 then cos(x/2)=?
Algebra.Com
Question 983798: If cos(x)=-1/3 then cos(x/2)=?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
}{2}})
Plug in your value and do the arithmetic.
John
My calculator said it, I believe it, that settles it
RELATED QUESTIONS
If sin x + cos x = 1/2 then sin^3 x + cos^3 x =... (answered by lwsshak3)
if sin(x)+cos(x)=1/2 then find the values :
(1) sin(x)*cos(x)
(2) sin^2(x)+cos^2(x)... (answered by Edwin McCravy)
Verify the expression: cos^3 + sin^2 cos = cos
Cos^3 + sin^2 cos = cos
Cos x cos^2 + (answered by Alan3354)
Please help me:
2. If cos x=1/2, then sin x= ?
3. If cotx=1, then x= ?... (answered by stanbon)
If sin x + cos x = 1/2
, then the value of
(sin^3 x + cos^3 x), is
please send me... (answered by lynnlo)
verify the identity
(cos(x)+isin(x))^3=cos(3x)+isin(3x)
so far i have completed the... (answered by Edwin McCravy)
if limit ((1 - cos (2 x) cos (2 kx))/(sin ^2(x))) = 10, then k = .... as x... (answered by Edwin McCravy,ikleyn,mccravyedwin)
if f(x)=cos((pi)/(x)) , g (2) = 3 , g '(2) = - 2, g ''(2) = 1/4, then , (f (g... (answered by Edwin McCravy,mccravyedwin)
if cscx=3, 90 < x < 180,
then
sin (x/2)=
cos(x/2)=... (answered by Alan3354)