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Prove that 5costheta+3cos(theta+pi/3)+3 ...

Prove that `5costheta+3cos(theta+pi/3)+3` lies between `-4a n d10.`

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To prove that \( 5\cos\theta + 3\cos\left(\theta + \frac{\pi}{3}\right) + 3 \) lies between \(-4\) and \(10\), we can follow these steps: ### Step 1: Rewrite the expression We start with the expression: \[ y = 5\cos\theta + 3\cos\left(\theta + \frac{\pi}{3}\right) + 3 \] ...
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