Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
Harry_the_cat
tangent question: What is value of 1/tan(pi*x) when x = 1/2? Is it 0?
Replies
16
Views
3K
Dr.Peterson
Dr.Peterson
U
First quadrant? They give sqrt{13}*sin(x) + 3 = 0, where 0 degrees < x < 90 degrees
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5
Views
1K
urimagic
U
B
How to draw a plane intersecting a cylinder at a "compound angle"
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0
Views
483
Bor
B
C
How do I find the area of this parallelogram? (lateral side 9cm, bases 12cm, angle 73*)
2
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31
Views
5K
Steven G
Steven G
U
Manipulation: How does [3p (sqrtl{2}/2) (cos(x) + sin(x))] / sin(x) become [3p (cos(x) + sin(x))] / [sqrt{2} sin(x)] ?
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2
Views
725
urimagic
U
A
Finding a radius to a line with two known points
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5
Views
943
Ahatmose
A
U
Trig LCD: how did it go from sin(24*)cos(24*) to (1/2)sin(48*)?
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3
Views
1K
Steven G
Steven G
P
Trig Help: int [sin^3(x) cos^2(x)] dx
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3
Views
807
PA3040D
P
P
Can I prove if this trapezoid is possible/impossible?
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19
Views
4K
pineapplewithmouse
P
B
Using fixed volume to find minimum surface area of cylindrical container w/ hemispherical lid, flat base
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3
Views
1K
Dr.Peterson
Dr.Peterson
T
The vertical asymptote of a tangent for f(x) = 1/tan(pi*x)
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2
Views
772
skeeter
skeeter
I
Trig and Inequality question: Find the θ to 4 significant digits for 0 ≤ θ < 2π if tan θ = -0.7434
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10
Views
4K
The Highlander
The Highlander
A
Trig equation: Solve -6 * sqrt[3] = -9 * csc(3 *theta) for theta
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10
Views
2K
Audentes
A
T
Neighbor's electricity cable (digging to find cable, hook up to it)
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11
Views
2K
Dr.Peterson
Dr.Peterson
imk
Robot Exit Angle Between Two Objects
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10
Views
2K
insanecarrots
I
shahar
The diameter is the longest cord in the circle
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3
Views
1K
insanecarrots
I
M
Show that the area of a triangle with sides a and b and with an included angle θ is A=(1/2)*a*b*sin(θ)
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5
Views
1K
Dr.Peterson
Dr.Peterson
K
Help with volume formula for elongated sphere of clay
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3
Views
1K
Kyria
K
K
Is my answer wrong? I got (1/2)a^2(2π−sin(2Ø)−2cos(Ø))
2 3
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45
Views
5K
blamocur
blamocur
A
Is there a relationship between the ratios of arc to chord between the angles ?
Replies
7
Views
2K
Dr.Peterson
Dr.Peterson
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