Unit circle

In the Cartesian coordinate system, a unit circle is given on which points A and B lie. Point O is the origin and has coordinates (0,0) and point B has coordinates (1,0). The size of angle BOA is 151°. Determine the x-coordinate of point A.

Correct answer:

x =  -0.8746

Step-by-step explanation:

r=1 α=151  A=(x,y)  cos α = x:r  x=r cos(α)=1 cos(151°)=0.8746



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geometryplanimetricsgoniometry and trigonometryUnits of physical quantitiesGrade of the word problem

 
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