Mathematics for IT

Lecture 4

trigonometric

TRIG REVIEW

• Trig Function Evaluation : • How to use the unit circle to find the value of

trig functions at some basic angles

• Graphs of Trig Functions: • The graphs of the trig functions and some nice

properties that can be seen from the graphs.

TRIG REVIEW (Cont.)

• Solving Trig Equations: • Techniques for solving equations involving

trig functions

• Inverse Trig Functions: • The basics of inverse trig functions

1. TRIG FUNCTION EVALUATION

• relate degrees and radians table

• Cos( and sin(

• Remember how the signs of angles work.

• If you rotate in a counter clockwise direction the angle is positive

• if you rotate in a clockwise direction the angle is negative