Sunday

January 25, 2015

January 25, 2015

Posted by **Kourt** on Friday, February 18, 2011 at 2:12pm.

- Math- Please Help!! -
**Greg**, Friday, February 18, 2011 at 4:12pm739 kilometers per hour. I used an online electronic flight computer.

- Math- Please Help!! -
**Reiny**, Friday, February 18, 2011 at 4:56pmmake a diagram.

from the origin draw a vector with a bearing of 30 degrees and mark its length 724. Call it OA

Draw a horizontal line AB of length 32

the angle OAB = 120 degrees

by cosine law:

OB^2 = 724^2+32^2-2(724)(32)cos120

= 548368

OB= 740.5

now by the Sine Law:

sinO/32 = sin120/740.5

sinO= .0374235

angleO=2.145

so the bearing is 30+2.1 or 31.1 degrees, and the ground speed is 740.5 km/h

check my arithmetic

**Answer this Question**

**Related Questions**

Math - An airplane has an airspeed of 724 kilometers per hour at a bearing of 30...

Math - An airplane has an airspeed of 724 kilometers per hour at a bearing of 30...

trigo - An airplane travels on a bearing of 245 degrees at an airspeed of 200 ...

Physics - An airplane has an airspeed of 770 kilometers per hour at a bearing of...

PreCalc - Vectors - An airplane is flying with an airspeed of 660 Kilometers per...

trig - an airplane has an airspeed of 430 miles per hour at a bearing of 135 ...

MATH - Andrea made a car trip of 440 Kilometers. She averaged 54 Kilometers per ...

math - Andrea made a car trip of 440 Kilometers. She averaged 54 Kilometers per ...

math - Phil is making a 40-kilometer canoe trip. If he travels at 30 kilometers ...

math - Phil is making a 40-kilometer canoe trip. If he travels at 30 kilometers ...