+109
The terminal ray of angle β , drawn in standard position, passes through the point (−7, 23‾√).
What is the value of cosβ ?
+36916 I THINK you mean -7 , - sqrt 23 this is in Quadrant III sin and cos will be negative
the point describes a right triangle with the x-axis
hypotenuse (using Pythag Theor)
= hyp^2 = (-7)^2 + (-sqrt 23)^2
hyp = sqrt 72
cos = adj / hyp = - 7 / sqrt(72) and simplify......
+36916 I THINK you mean -7 , - sqrt 23 this is in Quadrant III sin and cos will be negative
the point describes a right triangle with the x-axis
hypotenuse (using Pythag Theor)
= hyp^2 = (-7)^2 + (-sqrt 23)^2
hyp = sqrt 72
cos = adj / hyp = - 7 / sqrt(72) and simplify......
