Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
W
Roots of unity: solving z^5 = 1
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3
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4K
mmm4444bot
mmm4444bot
A
Vectors: defensive missile battery launches a ground to air missile...
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0
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982
APK911
A
T
Angle from two vectors and Atan2 (objects approaching each other)
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1
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3K
Ishuda
I
T
Problem with Atan2
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4
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3K
Tull
T
S
Finding sin(u) and cos(u) from tanu = 3/4
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1
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2K
Deleted member 4993
D
R
trigonometry (symmetry arguments and trig identities)
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2
Views
2K
Deleted member 4993
D
R
Triangle inequality: 9R^2 >= a^2+b^2+c^2+(a-b)^2+(b-c)^2+(c-a)^2
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2
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2K
HallsofIvy
H
J
Conjecture of similar rectangles triangles
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2
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1K
stapel
stapel
J
Triangles without Infinite decimals
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2
Views
3K
stapel
stapel
T
Outdoor kitchen measurements!
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2
Views
964
stapel
stapel
B
Given Tangent Line, Find Circle Radius: XY tangent to circle O. If OZ = ZX, XY=6,...
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6
Views
3K
Deleted member 4993
D
B
Angle and Arc Problem: If <BEC = 71*, EF cong. EG, arc AB = 18*, arc AE = 3*arc CD,
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7
Views
4K
mmm4444bot
mmm4444bot
L
Find the area of the equilateral triangle
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2
Views
1K
stapel
stapel
M
Can someone explain, for sin(t)=a, how to get soln t=(-1)^k sin^(-1) (a) + πk ?
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2
Views
2K
stapel
stapel
J
Help needed with Angle to bearing conversion
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1
Views
990
stapel
stapel
K
Geometry Similarity Question: nested similiar triangles, 2 pairs of par. lines, and
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5
Views
2K
Kiratani
K
D
Need help with geometric formula !
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3
Views
1K
Deleted member 4993
D
T
Scalene Triangle Without Sin or Cos Rules?
Replies
4
Views
1K
TreasureDragon
T
F
The Unit Circle (can't really explain any more, sorry)
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2
Views
1K
ksdhart2
K
L
How to calculate the angle between the diagonal and the surface of a cube?
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2
Views
2K
stapel
stapel
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