Application

In navigation, angles are used to designate the course of a plane, a ship etc. Note that a navigator's compass is marked in degrees in clock wise direction, with 60⁰ at due north (see fig). So to understand phrases like 'the object is on the course of 90⁰' in what direction the plane or boat is headed ? We must use the navigator's notations.

Index

3. 1 Solving Right Triangles
3. 2 Law of Cosines
3. 3 Law of Sines
3. 4 The Ambiguous Case of Law of Sines
3. 5 Areas of Triangles
Supplementary Problems

Chapter 4