Concept Check In later chapters we will study trigonometric functions of angles othe...

Concept Check In later chapters we will study trigonometric functions of angles other than quadrantal angles, such as and so on. To prepare for some important concepts, provide conjectures in Exercises 103–106. Be sure that your calculator is in degree mode.

The angles 25° and 65° are complementary. With your calculator determine tan 25° and cot 65°. Make a conjecture about the tangents and cotangents of complementary angles, and test your hypothesis with other pairs of complementary angles. (Note: This relationship will be discussed in detail in Section 2.1.)