Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
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Show, among 9 pts in rectangle [-1,1]x[0,1], there are 2 pts w/ dist. <1/sqrt[2]
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4
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1K
Dr.Peterson
Dr.Peterson
C
Trajectory problem: Given a 3-dimensional rectangular solid sitting on the earth...
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1
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818
Deleted member 4993
D
T
Need help w/ trigonometry problem: x pos., acute, cos(x)= a, then tan(x)=...?
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3
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1K
TheGreatBuBBy
T
M
Can someone help with the below please: circle inscribed in square w/ area 196cm^2
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4
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2K
Steven G
Steven G
M
Angles of Elevation: 173 metres from the base of the Eiffel Tower
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2
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2K
HallsofIvy
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M
Perimeter Q: A right-angled triangle has its two perpendicular sides in the ratio 5:1
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1
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916
Deleted member 4993
D
S
Trigonometric Equations: Solve sin 3x - sin x = cos x, cos 2x + 3 sin x = 2
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2
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916
stapel
stapel
M
Find values on x axis above function: x(t)=(cosπt)(sin20πt)
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12
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4K
Steven G
Steven G
G
How ratios are written here? (Circle center O, r=7, m(BOC)=120; |BC|=?)
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16
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2K
sinx
S
Y
Prove that the longest line segment in a triangle is on the sides.
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8
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3K
Dr.Peterson
Dr.Peterson
L
Find all values of theta in the interval [0 degrees,360 degrees)that satisfy the equa
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2
Views
656
Dr.Peterson
Dr.Peterson
S
Help please: Find the general solution of the equation: sin theta = cos 8 theta, then
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2
Views
774
Sand
S
S
Trigonometry: If 13 sin x = 5 where x is the greatest positive angle, then find ...
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2
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847
Sand
S
B
congruence triangle problem
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4
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1K
Dr.Peterson
Dr.Peterson
P
Is an angle equal to the lenght of one side of triangle where the altitude is situate
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7
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1K
Dr.Peterson
Dr.Peterson
G
Bulk Density and Spherical Packing (need to increase weight of fixed-volume cylinder)
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10
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3K
JeffM
J
A
Cylinders A has r=2, contains 40pi water to height h=10. Cylinder B, r=5, is empty.
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7
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3K
Dr.Peterson
Dr.Peterson
W
Calculating radius of cone - Only area of 123081 and volume of 2462940 are given
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3
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1K
Ward
W
S
Circles: Three circles fit inside rectangle as shown....
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13
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4K
yma16
Y
A
Rectangle, 16cm by 6cm, is inside Semicircle... Find shaded area.
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6
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6K
Steven G
Steven G
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