Mobile Notice
You appear to be on a device with a "narrow" screen width (i.e. you are probably on a mobile phone). Due to the nature of the mathematics on this site it is best viewed in landscape mode. If your device is not in landscape mode many of the equations will run off the side of your device (you should be able to scroll/swipe to see them) and some of the menu items will be cut off due to the narrow screen width.
Section 1.3 : Trig Functions
Determine the exact value of each of the following without using a calculator.
Note that the point of these problems is not really to learn how to find the value of trig functions but instead to get you comfortable with the unit circle since that is a very important skill that will be needed in solving trig equations.
- \(\displaystyle \cos \left( {\frac{{5\pi }}{6}} \right)\) Solution
- \(\displaystyle \sin \left( { - \frac{{4\pi }}{3}} \right)\) Solution
- \(\displaystyle \sin \left( {\frac{{7\pi }}{4}} \right)\) Solution
- \(\displaystyle \cos \left( { - \frac{{2\pi }}{3}} \right)\) Solution
- \(\displaystyle \tan \left( {\frac{{3\pi }}{4}} \right)\) Solution
- \(\displaystyle \sec \left( { - \frac{{11\pi }}{6}} \right)\) Solution
- \(\displaystyle \cos \left( {\frac{{8\pi }}{3}} \right)\) Solution
- \(\displaystyle \tan \left( { - \frac{\pi }{3}} \right)\) Solution
- \(\displaystyle \tan \left( {\frac{{15\pi }}{4}} \right)\) Solution
- \(\displaystyle \sin \left( { - \frac{{11\pi }}{3}} \right)\) Solution
- \(\displaystyle \sec \left( {\frac{{29\pi }}{4}} \right)\) Solution