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If Cos angle is equal -15/3, and sin angle is negative, then cot angle, to the nearest tenth is ____.

 May 18, 2022
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The problem setter has made a mistake. Cosine of an angle must be within -1 and 1. -15/3 is -5, which is outside of the range. (Unless the angle is a complex number, of course, but that is out of consideration for, supposedly, a math problem in high school.)

 May 18, 2022

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