SOLUTION: Without using your calculator,find two angles, 0°&#8804; x < 360° cos x=-1/sqrt(2) I don't know any special angles for cos that equal this.

Algebra ->  Trigonometry-basics -> SOLUTION: Without using your calculator,find two angles, 0°&#8804; x < 360° cos x=-1/sqrt(2) I don't know any special angles for cos that equal this.      Log On


   



Question 1107106: Without using your calculator,find two angles, 0°≤ x < 360°
cos x=-1/sqrt(2)
I don't know any special angles for cos that equal this.

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
You don't?
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cos(45) = sin(45) = sqrt(2)/2
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Know that.
Remember it.