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The Right Triangle
Nicolaas Lems
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Contents
Sine Cosine
Tangent
What is a Right Triangle?
Title PageReferences State Core
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SineSine(a)=Opposite/Hypotenuse
Opposite
Adjacent
Hypotenuse
a
Problem using Sinecontents
Click Here
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Cosine
Opposite
Adjacent
Hypotenuse
a
Cosine(a)=Adjacent/Hypotenuse
Problem using Cosine contents
Click Here
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Tangent
Opposite
Adjacent
Hypotenuse
a
Tangent(a)=Opposite/Adjacent
Problem using Tangent contents
Click Here
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What is a Right Triangle?
A right triangle is a triangle with one of it’s three angles measuring to be 90º
More on the right triangle contents
Click Here
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10
32°
X
need help
Find the Value of X using the Sine
answer contentspr v oue is
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12.5
X
70º
need help
Find the value of X using the Cosine
answer contentspr v oue is
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20
X50°
need help
Find the value of X using the Tangent
answer contentspr v oue is
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Answer
10
32°
X
Sin(32º)=X/10
X=sin (32º)*10
X=5.3
contentsClick to see answer
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Answer
12.5
X
70º
Cos(70º)=12.5/X
X= 12.5/Cos(70º)
X=36.5
contentsClick to see answer
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Answer
20
X50°
Tan(50º)=20/X
X=23.8
X=20/ Tan(50º)
contentsClick to see answer
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ReferencesMath World
http://mathworld.wolfram.com/RightTriangle.html
Webmath.com
http://www.webmath.com/rtri.html
contents
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State CoreStandard 2Students will represent and analyze mathematical situations and properties using patterns, relations, functions, and algebraic symbols.
Objective 2.1 Use patterns, relations, and functions to represent mathematical situations.
Identify trigonometric relationships (sine, cosine, and tangent) using right triangles, expressing the relationships as fractions or decimals.
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