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- Linear Equations
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- Quadratics Functions
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- Multiplying Polynomials
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Trigonometric Ratios
Sine = Opposite Tangent = Opposite
Hypotenuse Adjacent
= O = O
H A
Cosine = Adjacent =A
Hypotenuse H
ß*this side never changes*à
Hypotenuse – the longest side, opposite the right angle.
Opposite – the other side, opposite the angle you’re looking at.
Adjacent – the side next to or right beside the angle you’re looking at
* Your O and your A changes depending on what angle you’re looking at*
Find –A Find –C
Sin A = 4 Sin C =3
5 5
Cos A =3 Cos C =4
5 5
Tan A =4 Tan C =3
3 4
Calculating Angles Using Trig Ratios
To get this answer use your calculator and one of the following do as the
Push à 2nd F or shift | Pushà decimal
Pushà Sin/Cos/Tan | Pushà 2nd
Pushà decimal | Pushà Sin/Cos/Tan
Pushà = | Pushà =
Ex. Sin=3 Cos= 4 Tan=3
5 5 4
=0.6 =0.8 =0.75
Sin=36.86 Cos=36.86 Tan=36=86
Calculating Decimals Using Trig Ratios
To get this answer use your calculator and one of the following do as the
Pressà Cos/Sin/ Tan | Pressà Whole # (degree)
Pressà whole # (degree) | Pressà Cos/Sin/Tan
Pressà = | Pressà =
Ex. Cos 75 = 0.2588
Sin 12 = 0.2079
Calculating Side Length Using Trig Ratios
To find the side length you must make the degree into a decimal.
Then depending on the side length you are finding you divide or you multiply.
Ex.
SOH
Sin43= a
67
0.6819=a
67
67 X 0.819=a
45.68=a
there for side BC or a equals 45.68