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Knowledge Check Quiz

EXAMS.IE

Unit Circle

Hint

Each point on the circumference has coordinates \((\cos\alpha,\sin\alpha)\).

1 / 5

The \(x\) coordinate on the circumference of the unit circle corresponds to which of the following?

Hint

Each point on the circumference has coordinates \((\cos\alpha,\sin\alpha)\).

2 / 5

The \(y\) coordinate on the circumference of the unit circle corresponds to which of the following?

Hint

Each point on the circumference has coordinates \((\cos\alpha,\sin\alpha)\).

3 / 5

If \((x,y)\) is the coordinate of a point on the unit circle, which of the following refers to \(\tan\alpha\)?

Hint

\(\cos\alpha\) refers to the \(x\) coordinate of a point on the unit circle.

4 / 5

\(\cos(-\alpha)=\cos\alpha\)

Hint

\(\sin\alpha\) refers to the \(y\) coordinate of a point on the unit circle.

5 / 5

\(\sin(-\alpha)=\sin\alpha\)

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