Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
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Matrix Eliminations to find intersections of planes
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4
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2K
stapel
stapel
O
finding surface area of square pyramid, given height, volume
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2
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6K
soroban
S
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help finding surface area of triangular prism (tent)
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2
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18K
soroban
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Proofs with two circles: prove XY is perp. bisector of PQ
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1
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2K
galactus
G
S
(cot x / cos x) + (sec x / cot x) = csc x * sec^2 x
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5
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4K
screambloodygore
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S
need to find radius of cylinder, given height, surface area
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1
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41K
soroban
S
J
Help: height of parallelogram is half the length of....
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1
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2K
Denis
D
S
csc x - sin x = cot x * cos x
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3
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38K
screambloodygore
S
M
Equilateral Triangle: find area, given distances to point P
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3
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5K
TchrWill
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Neopets "Lenny Conundrum" puzzler - Round 169
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1
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3K
stapel
stapel
E
Parametric equations: convert to equation in only x and y
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4
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2K
echo123
E
V
Angles in a circle: prove m(2) = 2m(1)
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1
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2K
skeeter
skeeter
S
difficulty-s-2: what curve is traced out by this locus?
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2
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2K
sujoy
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S
difficulty-s-1: provide that locus is straight line
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2
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2K
sujoy
S
G
trigonometry: AB = 15.5, AC = 10.2, angle A = ?
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1
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2K
happy
H
C
Find the period of y = 3cos(x/2 + pi)
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1
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2K
stapel
stapel
F
Sine, cosine, tangent
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1
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3K
Denis
D
H
magnitude and direction of vectors
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1
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2K
pka
pka
T
Some help with proving trig identities and other things
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4
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4K
soroban
S
R
Solving tan(ax) = k*1/x
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0
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1K
RedFox
R
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