Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
T
Chord length of a circle using arc lenght?
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2
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2K
tomadom
T
N
Yards, area, squaring: perimeter set up around crime scene that spans 3 city blocks
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4
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3K
No Name
N
S
Find a point on an ellipse given major and minor axis
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8
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2K
sabooru
S
R
I'm trying to remember the formula for a semi-circle using sin and cos.
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6
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4K
ronhollenbeck
R
D
Find angle DFE. Probably using inscribed angles, circle, chords, arcs.
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8
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3K
Dr.Peterson
Dr.Peterson
S
Help w/ exponential: H(w) = (1/2)(1 - e^{-jw}) = sin(w/2) e^{-jw/2} e^{j pi / 2}
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8
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4K
superbrew
S
D
Trigonometry Proof: For the sharp angles a and b is: sin (a + b) < sin a + sin b
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2
Views
951
JeffM
J
J
Finding Gradient slope: Elev. A = 200.05, Elev. B = 325.25, hor. dist. 1625'; find %
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1
Views
902
Deleted member 4993
D
L
Finding measures
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3
Views
853
yma16
Y
F
Triangle congruence
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2
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1K
Nessittere
N
D
Name the postulate or theorem you can use to prove two triangles are equal.
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9
Views
5K
Steven G
Steven G
D
Suppose line A equals line B and line C equals line D. Can you use the SSS Postulate.
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7
Views
2K
DrGore
D
E
Prove that one trig function equals another (too lengthy to include in title)
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5
Views
967
yma16
Y
M
Use trigonometric identities to verify each identity: cot(A/2) - tan(A/2) = 2cotA and
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1
Views
908
stapel
stapel
S
double compound formulae and other bits: If θ is fixed real number w/ 0≤θ<2π, show...
Replies
2
Views
807
stapel
stapel
A
Find A: If SinA = 2Cos^2A, find A.
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2
Views
1K
AA.R
A
C
See Saw Equation
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1
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945
CPerry
C
G
Sound localisation using multilateration?
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2
Views
1K
Dr.Peterson
Dr.Peterson
B
Determining the relative coords of a 3D point from one coordinating system to another
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1
Views
1K
lev888
lev888
N
Question about angles & vectors: So if I say something move 15 degrees...?
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2
Views
1K
Steven G
Steven G
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