AnnahZ335283 AnnahZ335283
  • 31-10-2022
  • Mathematics
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I need help with this practice It is trig from my ACT prep guideI will send an additional picture later of my attempted answer of this

I need help with this practice It is trig from my ACT prep guideI will send an additional picture later of my attempted answer of this class=

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KalieghA723604 KalieghA723604
  • 31-10-2022

ANSWER

EXPLANATION

Angle α lies in quadrant II, which means that its sine is positive and its cosine is negative.

Angle β lies in quadrant IV, which means that its cosine is positive and its sine is negative,

The cosine of a difference of two angles is,

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