Points $$A, B$$, and $$C$$ are plotted on the unit circle. ![](http://admin.getprephub.com/media/editor/tr9_20230119190428508358.png) Which of the coordinates is equal to $$\sin (\frac{4 \pi}{5})$$ ?

Here, $$\frac{4 \pi}{5}=\pi-\frac{\pi}{5}$$ \frac{\pi}{5} lies in the $$2^{\text {nd }}$$ quadrant, $$A$$ also lies in $$2^{\text {nd }}$$ quadrant. Therefore, $$y$$ coordinate of $$A$$ is $$\sin (\frac{4 \pi}{5})$$

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Question

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MCQ

Points $A, B$ , and $C$ are plotted on the unit circle.

Which of the coordinates is equal to $\sin (\frac{4 \pi}{5})$ ?

Select all that apply :

y co-ordinate of $A$

x co-ordinate of $A$

x co-ordinate of $C$

y co-ordinate of $B$

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