Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
S
Chandelier design geometry problem Please help!
Replies
5
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2K
chapdawg147
C
R
Find modulus, argument of 1/z + 1/(2 - 1/z + 1) for z = 3-2i
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4
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2K
pka
pka
K
basic trig: find cos(180 deg.), sin(360 deg.), csc(315 deg.)
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1
Views
6K
skeeter
skeeter
B
Solve (e^x + e^-x) ÷ e^x – e^-x= 2
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1
Views
9K
pka
pka
H
proving Trig Identitity: (1- tanx)^2 = sec^2x - 2tanx
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2
Views
16K
soroban
S
V
A problem with cotangent squared: 1.6666 = cot^2 (theta/2)
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3
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3K
Vix
V
N
Finding an equation for an ellipse
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4
Views
1K
norton
N
M
Trig: ang. velocity of wheel diam. 24 in on car going 10 mph
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5
Views
2K
soroban
S
K
Prove 2 3D lines intersect
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2
Views
10K
ku1005
K
B
prove [sin(x) - sin(y)] / [cos(x) + cos(y)] = tan(x-y/2)
Replies
1
Views
1K
soroban
S
B
prove [sin(x) - sin(3x)] / [cos(x) + cos(3x)] = -tan(x)
Replies
4
Views
4K
baselramjet
B
P
How many diagonals does a convex polygon with 20 sides have?
Replies
7
Views
3K
pka
pka
N
Equation for a parabola
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1
Views
1K
galactus
G
A
Solve 3 cos^2(sigma) + 2 sin(sigma) = 1
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1
Views
1K
skeeter
skeeter
P
triangle has sides of length 6 and 11. what int. length...?
Replies
2
Views
2K
pka
pka
D
right triangle trig: finding angle of elevation of sun
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2
Views
2K
dianeson121
D
A
can some hlep me solve this trig problem
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1
Views
3K
skeeter
skeeter
P
[Precalc] Trig Identities and Equations
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2
Views
1K
prefix
P
K
Triangle GHI is a right triangle; GH=5, HI= x+4, GI= 2x-3
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1
Views
2K
arthur ohlsten
A
J
Find area of reg. pentagon w/ s = 7 and apothem of 4.8
Replies
4
Views
2K
JayJay06
J
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