Trigonometric Co-functions

Understand trigonometric co-functions with practice exercises on reference angles and value calculations.

Write your name, student number and class below. Determine the angle in quadrant I which corresponds to each of the following. Example: 340o = 20 degreesJust the write the number and degrees. 70 degrees 45 degrees 25 degrees 40 degrees 50 degrees 60 degrees 60 degrees 30 degrees 40 degrees 15 degrees State the relationship between the value of each of the following angles and its respective value of the corresponding angle in quadrant I. Example: cos 120o = -cos 60 sin 70 -sin 45 -sin 25 -cos 40 -tan 50 tan 60 -tan 60 -cos 30 cos 40 Find the value of each of the following. -1.2799 -0.7431 -0.1045 0.7431 1.2799 0.1045