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January 30, 2015

January 30, 2015

Posted by **Rosagne** on Monday, January 14, 2013 at 8:03pm.

- math pre calc -
**Reiny**, Monday, January 14, 2013 at 8:44pmmake sure your calculator is set to degrees

2nd

sin

(1/2.9)

= 20.17

You want the angle between 0 and 180, that is in the I or II quadrant.

20.17° is in quadrant I

the angle in quadrant II would be 180 - 20.17 = 159.83°

check:

take the sine of each of those angles and compare it to 1/2.9

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