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Make sure your answer is in

degrees. You should be able to
find this without a calculator.
-1
12/1/= = [?]°
sin-1

Make sure your answer is in degrees. You should be able to find this without a calculator-example-1

1 Answer

8 votes

Answer:

210° , 330°

Explanation:

using the sides of the 30- 60- 90 triangle

with legs 1,
√(3) and hypotenuse 2 , then


sin^(-1)
(1)/(2) = 30° ← related acute angle

since
sin^(-1) -
(1)/(2)

then angle is in third / fourth quadrants , then required angles are

180° + 30° = 210° ← in third quadrant

360° - 30° = 330° ← in fourth quadrant

User Levent Tulun
by
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