How to find negative cosine

Practice Questions

ACT Math › How to find negative cosine

Questions

5

1

If $cos(x)=-\frac{\sqrt{3}}{2}$ and $0 \le x \le \pi$ , what is the value of $cos(x+\pi)$ ?

2

What is the cosine of the angle formed between the origin and the point if that angle is formed with one side of the angle beginning on the -axis and then rotating counter-clockwise to ? Round to the nearest hundredth.

3

On a grid, what is the cosine of the angle formed between a line from the origin to and the x-axis?

4

To the nearest , what is the cosine of the angle formed between the origin and ? Assume a counterclockwise rotation.

5

What is the cosine of the angle formed between the origin and the point if that angle is formed with one side of the angle beginning on the -axis and then rotating counter-clockwise to ? Round to the nearest hundredth.

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