Finding Eastward Velocity of an Airplane

[zelda1850]

Homework Statement

an air plane flied with a velocity of 750 kilometers per hour, 30 degrees south of east. what is the magnitude of the eastward component of the planes velocity?

Homework Equations

im not sure which equation is correct

750 sin 30 degrees or 750 cos 30 degrees

The Attempt at a Solution

im not sure which one I am suppose to use

 

[Doc Al]

The one with cosine is correct. Read this: http://www.physicsclassroom.com/Class/vectors/U3l1e.cfm#trig"

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