Trigonometry
Hey guys. My post will be about Trigonometry. oOo scared? Haha. Well sorry if this is kinda late :SI will show you how to find the sine, cosine, tangent, and the angle theta when given a point.
You all should already know how to get the sine, cosine, and tangent, from grade 9 or 10 math.
Ex) Given a point at (6, 8) Find the sine, cosine, tangent, and the theta
Be careful when finding sine, cosine, tangent and theta because it could be positive or negative, depending on the quadrant it is in.
A reference/related angle of a theta is in standard position. You would use the expression 180 -reference angle = theta.
Ex) If you are given an angle of 273 degrees, what is the reference angle?
NEVER give an answer for reference angle bigger than 90 degrees, only ACUTE angles.
THE END :) .. hmmm who shall I choose for the next blog .. hmm I wonder who .. How about my good friend .. JASMIN .. hehehe Have fun Jasmin! Oh and don't forget, Ms. Ingram assigned Ex 8, #'s 1-3.
Labels: Unit Blog
posted by xuanD @ 6:23 PM
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