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Wednesday, February 29, 2012

Test, Test, Test!

In case some of you are last-minute studiers (excluding myself, obviously... Eh-hm, eh-hm cough, cough), I will elaborate just a tad (for I also have a memory aid to make) on what the test may be about. Here is the orginial power point.

Six Trigonometric Ratios
  1. Sine = Opposite/Hypotenuse
  2. Cosine = Adjacent/Hypotenuse
  3. Tangent = Opposite/Adjacent
  4. Cosecant = Hypotenuse/Opposite
  5. Secant = Hypotenuse/Adjacent
  6. Cotangent = Adjacent/Opposite
As you may already know, numbers 1 and 4, 2 and 5 and 3 and 6 are reciprocals of each other. Remember the sohcahtoa and choshacao! Here is my post for this subject.

Radians and Degrees

Everything you need to know is right here. I'm just too lazy to re-copy it all onto here. :)

The B17

Alright, the way I remember the different quadrants:

  • Quadrant #1: Simple; 6, 4, 3 as denominators.
  • Quadrant #2: The pattern of denominators to numerators (2,2,3,3,4,5,6).
  • Quadrant #3: The second half of the pattern (7,6,5,4,4,3,3,2).
  • Quadrant #4: Same denominators as usual (3, 4 and 6) and use the n = 2d - 1 formula for the numerators.
Click here for more detailed information and here for more information on the Unit of Circle. 

The Sine & Cosine Function

So, there are a lot of things to remember about this!
  • Definition
    • Remember cos is x and sin is y
  • The basic functions:
    • y = asinb(x-h)+k
    • y = acosb(x-h)+k
  • The properties

And that is all! Good studying and hope you all do well on the test. :)

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