jendymarquez123 jendymarquez123
  • 02-03-2024
  • Mathematics
contestada

triangle ABC is shown. what is cos ​

triangle ABC is shown what is cos class=

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stickykey stickykey
  • 02-03-2024

cosine represents the x-value of the point on the unit circle that is [tex]\theta[/tex] degrees counterclockwise from the increasing x direction.

Then cosine is given by the hypotenuse over the adjacent side to the angle.

Then cos(<BAC) is simply [tex]\frac{4}{4\sqrt{5}}[/tex]. This can be simplified to [tex]\frac{\sqrt{5}}{5}[/tex].

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