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precalc unit 5
| Question | Answer |
|---|---|
| arc length formula | s = rθ |
| quandrantals in pi radians: | top: pi/2 bottom: 3pi/2 left: pi right: 0, 2pi this is for counterclock wise/positive. switch top and bottom if clockwise/negative! |
| quandrantals in decimal radians: | top: 1.57 bottom: 4.71 left: 3.14 right: 0, 6.28 this is for counterclock wise/positive. switch top and bottom if clockwise/negative! |
| finding coterminal angles: | + or - 2pi |
| reference angles: | closest angle for either side of the x-axis. always POSITIVE! |
| counterclockwise: | positive angle |
| clockwise: | negative angle |
| period: | length of x-values that are keep repeated |
| if you get g(#) and the # is not on the given table, what do u do? | add or subtract by the period given to get onto the table. this might take more than one time |
| find ALL coterminal angles: | whatever value it is given + 2pi k WHERE K IS AN INTEGER |
| when you find angles, make sure you have... | theta symbol = ...... |
| pythag triples: | 3-4-5 5-12-13 7-24-25 8-15-17 9-40-41 |
| sin: | y/r |
| cos: | x/r |
| tan: | y/x |
| csc: | r/y |
| sec: | r/x |
| cot: | x/y |
| radius is always.... | positive!!!!! |
Created by:
acuda25