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# If 0° ≤ A ≤ 360° find the possible measures for: a) cos A = - √3/2 and b) tan A = -1 ???

If 0° ≤ A ≤ 360° find the possible measures for:

a)cos A = - √3/2

b) tan A = -1

(Question A attached as a picture)

### 2 Answers

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- IndikosLv 76 months agoFavorite Answer
cos(pi/6) = sqrt(3)/2

Since cos(pi - x) = -cos(x)

it follows cos( pi - pi/6) = -sqrt(3)/2

or A = 5pi/6

- Anonymous6 months ago
rhugurguhriguhrghughu

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