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Find -2pi/3 in standard position and find it's reference angle in degrees and radians.

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I really need help with these three problems, I can't figure them out. Thank you so much.

asked Nov 14, 2016 in TRIGONOMETRY by anonymous

3 Answers

0 votes

(1)

Reference angle of image.

Convert Radians into degrees is

image

Find reference angle.

image

Reference angle of image is image

answered Nov 14, 2016 by Anney Mentor
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(2)

image

Apply Pythagorean theorem then

image

In the image Sin function is negative and Cos function is positive.

image

answered Nov 14, 2016 by Anney Mentor
0 votes

(3)

Graph the equation is image.

image

answered Nov 14, 2016 by Anney Mentor

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