How do i solve the equation:

3 cos x - sin x/2 - 1 = 0

in the interval 0<x<720

Thx!

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- May 3rd 2009, 08:04 AMSundaesolve
How do i solve the equation:

3 cos x - sin x/2 - 1 = 0

in the interval 0<x<720

Thx! - May 3rd 2009, 09:04 AMrunning-gag
Hi

$\displaystyle \cos x = 1 - 2\sin^2\left(\frac{x}{2}\right)$

which leads to a quadratic in $\displaystyle \sin\left(\frac{x}{2}\right)$