Hannah L.

asked • 07/05/16# pre calc BEARING problems, multiple questions, please answer ASAP, I am very confused

## 3 Answers By Expert Tutors

^{o}.

^{o}. So, 40 + 180 = 220

^{o}for the first. Then 120 + 180 = 300 degrees for the second.

Kenneth S.

*Steven W. comments:*In my experience, angles are conventionally measured from the +x axis counterclockwise (in other words, starting at due east and then swinging around counterclockwise. By this reckoning, an angle 20 degrees west of due north would be 90 degrees (the angle from east to north) plus the additional 20 degrees past north, heading towards west, so 90 + 20 = 110 degrees.

**The above conventions are the one that are used in trigonometry, for the so-called circular functions...i.e. sine & cosine periodic functions of any real number (radian measure), with the domain ALL REALS.**

**CW**beginning at North = 0 deg, etc.

07/05/16

Kenneth S. answered • 07/05/16

Let's cut to the chase: I know this subject & how to teach YOU

**make a drawing!**

^{o}--that's the bearing. (We're measuring angles in a clockwise manner, relative to North.)

**It means 'basically, go due north, but veer away 20**

^{o }to the west. Net bearing is360-20 = 340^{o}Hannah L.

07/05/16

David W. answered • 07/05/16

Advanced Calculus, Vector Analysis, Diff Eq ... Statistics in college

**bearing**to a point is the angle measured in a clockwise direction from the North line.

N20ºW means the

**direction**(not bearing) is 20º west of north. If the compass has 0° (and 360°) pointing North and degrees are clockwise (that is, 90° is East), then the

**direction N20°W**is the

**bearing 340°**.

Airport runways have large numbers at each end (see an aerial view on the Internet) – for example, 17 and 35 that mean 170° and 350°.

Now: (1) going in the opposite bearing of 40° is 220°. [note: your either add or subtract 180°]

And (2) the opposite bearing from 120° is 300°.

**bearings give directions**(clockwise from the North line); they are not vectors and they have no indication of distance between points)

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Michael J.

07/05/16