### Home > PC3 > Chapter 8 > Lesson 8.3.2 > Problem 8-100

8-100.

For each of the trigonometric functions below, decide if they are even, odd, or neither. Then use the even/odd properties of each function to complete each equation below. Homework Help ✎

sin(–

*x*) = _____cos(–

*x*) = _____tan(–

*x*) = _____

Review your work from parts (d) through (f) of problem 8-89.

An angle measure of 2*π* − *x* = *x* in the unit circle.

If sin(−*x*) = sin(*x*), then sine is an even function.

If sin(−*x*) = −sin(*x*), then sine is an odd function.

Is the graph of *y* = cos(*x*) symmetric across the *y*-axis, or is it symmetric about the origin?

Is the sign of tangent the same in Quadrants I and II or is the sign the same in Quadrants I and III?