If displaystyle cos x = frac{1}{2}, then displaystyle cos 3x = ?
Cos x = -1/2
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![Integrate the Rational Functions `(Cos X)/((1-sinx)(2 - Sin X))` [Hint: Put Sin X = T] - Mathematics | Shaalaa.com](https://www.shaalaa.com/images/_4:8b824015f4854705812ca77129c8894f.png "Integrate the Rational Functions `(Cos X)/((1-sinx)(2 - Sin X))` [Hint: Put Sin X = T] - Mathematics | Shaalaa.com")
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Cos x = -1/2
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![How do you solve the following equation 2 cos x - 1=0 in the interval [0, 2pi]? | Socratic](https://useruploads.socratic.org/8MDbkKkzT5wt51XnUkXm_unitcircle1.PNG "How do you solve the following equation 2 cos x - 1=0 in the interval [0, 2pi]? | Socratic")
How do you solve the following equation 2 cos x - 1=0 in the interval [0, 2pi]? | Socratic
6. Find sinx/2 , cosx/2, tanx/2 Cosx= 1/3 ; x in 3rd quadrant
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SOLUTION: Find all EXACT solutions of the equation cos(x ) = −1/2 in the interval [0,2π). If there is more than one answer, enter them in a list separated by commas.
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The general solution of the equation cos theta = frac {-1}{2} is
