Hello, Judi!

What do you mean by "use cosine"?

Radar stations and are on an east-west line, 8.6 km apart.

Station detects a plane at , on a bearing of 53°.

Station simultaneously detects the same plane, on a bearing of 323°.

Find the distance from to

Why can I not use cosine to find the length?Code:C * : * * : : * *37°: : * * : : 53° * * : : * 37° 53° *: * - - - - - - - - - - - * A 8.6 B

If you mean "the Law of Cosines", we can't.

. . The Law of Cosines requiressides ... and we have only one.two

If you note that , youuse cosine.can

.