Hey guys, this is Naavi & I’m here to explain what we did on Friday. I was supposed to do it on thursday, but I couldn’t get into the blog. x)
On Friday, we learned about the trigonometric ratios, and the C.A.S.T rule.
Trigonmetric Ratios:
The value of ‘r’ is known as the radius vector, it’s length is always positive and is the hypotenuse on a triangle.
The other 2 points/sides are ‘x’ and ‘y’. If ‘x’ and ‘y’ is on the terminal arm of an angle in std position, that means that:
Sin o (theta) = opposite/hypotenuse (y/r)
Cos o (theta) = Adjacent/Hypotenuse (x/r)
Tan o (theta) = opposite/adjacent (y/x)
Make sense? I hope so. xD
The C.A.S.T Rule
The C.A.S.T rule is pretty simple, basically, it tells us if the trig ratio is positive or negative on the four quadrants.
And yeah, I think that’s all we learned on Friday. I hope this made sense to you guys, I know I’m not very good at explaining things. x)
The application of trigonometric ratios is immense in height and distance.
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