Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
F
Can I prove sin(3t)+sin(t)=2sin(2t)cos(t) with these tools? (t=theta)
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5
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2K
Steven G
Steven G
C
Help!! "The two figures are congruent. Identify corresponding sides & angles."
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6
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2K
The Highlander
The Highlander
4
If a circle with a circumference of 16 times pi inches is circumscribed about a square, what is the length of a diagonal of the square?
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3
Views
1K
MathTutorPro
M
X
How can I get sinx, given 1-cos(x)-cos(y)+sin(x)cos(y)=0, 1+cos(x)-sin(y)+sin(x)sin(y)=0
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4
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2K
Dr.Peterson
Dr.Peterson
C
Calculate QRS. (Why is angle QRS = 131 degrees?)
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12
Views
3K
chijioke
C
C
How far is 1.5 cm chord from the center?
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5
Views
2K
chijioke
C
C
How find the angle subtended by a chord at the circumference of a circle
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14
Views
4K
chijioke
C
S
Solve the following word problem completely (Special Parallelograms)
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1
Views
784
mmm4444bot
mmm4444bot
M
Gauss curvature integral: Why do we have a double integral?
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12
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2K
Mondo
M
A
Counting Triangles with Polygons
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6
Views
2K
AvgStudent
A
T
how many feet across is my plot of land
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5
Views
1K
stapel
stapel
F
Oprimization problem Right trapezoid (design of a building)
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5
Views
2K
Otis
Otis
F
How can I find length of AB and DB? (ABC is a triangle in which m(<B)=90...)
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11
Views
2K
The Highlander
The Highlander
P
Trig identity / equation help :) H_c=151.8-sqrt[192584.0-103612.3*...]
Replies
6
Views
1K
Steven G
Steven G
P
Finding the volume of a stand up pouch
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6
Views
3K
blamocur
blamocur
A
Need explanation to the answers
Replies
8
Views
1K
topsquark
topsquark
L
compound angle problem
2
Replies
21
Views
4K
mmm4444bot
mmm4444bot
J
Angle of Depression question
Replies
5
Views
1K
The Highlander
The Highlander
M
arc length question (Arc length AB, Radius 4, angle length pi/6)
Replies
4
Views
1K
The Highlander
The Highlander
J
primitive mathematical concepts
Replies
2
Views
718
pka
pka
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