Find the coordinates of the point on a circle with radius 20 corresponding to an angle of 120o . If your answer is not an integer then round it to the nearest hundredth. The x component of the coordinate is AnswerThe y component of the coordinate is Answer

Find the coordinates of the point on a circle with radius 20 corresponding to an angle of 120o If your answer is not an integer then round it to the nearest hun class=

Respuesta :

Let us draw a sketch to understand the question

We need to find the coordinates of the point (-x, y)

Since cos(60) = adjacent/hypotenuse

Since the adjacent = x

Since the hypotenuse = 20, then

[tex]cos\left(60\right)=\frac{x}{20}[/tex]

By using the cross-multiplication

[tex]x=20cos\left(60\right)[/tex]

Since x must be negative

Since cos(60) = 0.5, then

[tex]\begin{gathered} x=-20\left(0.5\right) \\ x=-10 \end{gathered}[/tex]

Since sin(60) = opposite/hypotenuse

Since the opposite = y

Since the hypotenuse = 20, then

[tex]sin\left(60\right)=\frac{y}{20}[/tex]

By using the cross multiplication, then

[tex]\begin{gathered} y=20sin\left(60\right) \\ y=20\left(\frac{\sqrt{3}}{2}\right? \\ y=10\sqrt{3} \end{gathered}[/tex]

Change it to decimal and round it to the nearest hundredth, then

[tex]y=17.32[/tex]

The x component of the coordinates is -10

The y component of the coordinate is 17.32

Ver imagen MeikaC419043