Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
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Trig Help...
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2
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966
Harry_the_cat
Harry_the_cat
F
Help Please: tan[2sin^-1(-12/13)]. What I did was solve the triple, but...
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1
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2K
Deleted member 4993
D
K
Zamboni Problem
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2
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2K
Kermit
K
E
Finding angle between lines with parametric equations
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0
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1K
escobarro
E
A
Stuck on 9 problems: cos (tan^-1 u + tan^-1 v), cos [sin^-1 2/3 + 2sin^-1 (-1/3)],...
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7
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2K
awdree
A
M
How do I write a true equation involving 2 or more angles? AB=BA, AE=CE
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2
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1K
stapel
stapel
Z
Having trouble finding lenght
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2
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1K
Zulgok
Z
Z
Vector problem - need help!
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1
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932
ksdhart
K
H
Similar Polygons: corresponding sides of two similar polygons have lengths 3 and 7.
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1
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2K
stapel
stapel
F
Badly Printed or Am I Missing Something?
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3
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1K
Flicksandtricks810
F
W
Distance to find shape of graph
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3
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1K
stapel
stapel
B
Identity Problem: 1 + cos ^2 x = 1 + sec ^2 x / 1 + tan ^2 x
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3
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1K
stapel
stapel
B
Verify identity and solve: 1 - sin (-u) / cos u + cos (-u) / 1 + sin = 2 sec u
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1
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1K
stapel
stapel
T
Proving that straight line divides the angle into two equal parts
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1
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2K
Deleted member 4993
D
M
All the three sides of triangle ABC have lengths in integral units, with AB = ...
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7
Views
4K
mtpnd98
M
L
I need help filling in two-column proof
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4
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2K
pka
pka
Z
Cant find angle
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4
Views
2K
Deleted member 4993
D
T
Need help solving some trig identities
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2
Views
1K
Deleted member 4993
D
A
A building inspector is checking a building height restriction....
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2
Views
1K
Deleted member 4993
D
Emerald123
Calculating expressions using sin of radians
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4
Views
2K
Emerald123
Emerald123
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