In this unit, our main focus is on trigonometric ratios and special angles.
There are 6 trigonometric ratios for us to memorize - tangent (tan), sine (sin), cosine (cos), cosecant (csc), secant (sec) & cotangent (cot).
While the special angles are 30˚, 45˚ and 60˚.
Csc, sec & cot are the reciprocal of sin, cos and tan respectively.
this is a picture of a special angle ( sixty degree and thirty degree)
this is another picture of a special angle ( forty degree)
however i found a table in my friend's blog which i think its pretty useful.
It really helps me a lot in understanding the triangle.
In this chapter, we need to use the CAST rule to calculate the exact value for the triangle.
What is CAST rule ?
Well, i found a video about the CAST rule, i hope it helps
Feel free to comment if you do not understand, i will try to explain it in detail :)
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