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Graph y=-x^(2)+3x+4. Be sure to show an x//y table and supporting work.

1515. Graph y=−x2+3x+4 y=-x^{2}+3 x+4 . Be sure to show an x/y x / y table and supporting work.

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Sin, cos, and tan of special anglesright chevron icon

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Q. 1515. Graph y=−x2+3x+4 y=-x^{2}+3 x+4 . Be sure to show an x/y x / y table and supporting work.
  1. Recognize angle on unit circle: Recognize that cos⁡90∘\cos 90^\circ corresponds to an angle on the unit circle.
  2. Recall unit circle coordinates: Recall that the unit circle has coordinates (cos⁡(θ),sin⁡(θ))(\cos(\theta), \sin(\theta)) for any angle θ\theta.
  3. Coordinates at 9090 degrees: At 9090 degrees, the coordinates on the unit circle are (0,1)(0, 1), which means cos⁡90∘=0\cos90^\circ = 0.

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