Posted by **Lauren T** on Friday, July 6, 2012 at 7:37pm.

An airplane flies on a compass heading of 90° at 310 mph. The wind affecting the plane is blowing from 332° at 40 mph. What is the true course and ground speed of the airplane?

- Trig/Precal -
**bobpursley**, Friday, July 6, 2012 at 8:41pm
add the vectors.

flying: 90sin310 E + 90 cos310 N

windblowing: 40sin(332-180)E+40cos(332-180)N

now add them

result: East(90sin310+40sin152)+North(90cos310+40cos152)

figure those, and you are near the end. Post your questions if you get lost from here.

- Trig/Precal -
**Beth**, Tuesday, June 7, 2016 at 2:49pm
Airplane going N 60 degrees W at a speed of 400 mph. What wind direction, at a speed of 75 mph will produce a resultant direction of N 50 degrees W.

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