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Mathematics, 25.10.2020 18:50 lukeperry

If the angle $\theta$ is such that $2\pi \le \theta \le 4\pi$ and $\cos\theta = -\frac7{25},$ what is the value of $\sin\frac\theta2?$

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If the angle $\theta$ is such that $2\pi \le \theta \le 4\pi$ and $\cos\theta = -\frac7{25},$ what i...
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