Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
H
Solve x + x/sqrt(x^2 - 1) = 35/12 using trigonometric identities
Replies
7
Views
3K
topsquark
topsquark
O
Need help w/ Finding X with semicircle inscribed in a right triangle
Replies
3
Views
2K
pka
pka
B
Stuck at a similar triangles problem.
Replies
5
Views
609
Dr.Peterson
Dr.Peterson
S
Stuck on this problem, which identity should I be using?
Replies
8
Views
1K
Dr.Peterson
Dr.Peterson
H
Proving an algebra inequality with trig identities
Replies
1
Views
543
Dr.Peterson
Dr.Peterson
M
Can you do a mathematical proof that triangles with the same angles have proportional sides
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8
Views
1K
MegaMoh
M
F
A, B centers of non-congruent circles intersecting at C, D. Find most precise name for ACBD....
Replies
9
Views
2K
Faye
F
W
Application of Trigonometry: Emma is 90m due west of Michele on a level road....
Replies
2
Views
952
MarkFL
MarkFL
J
Need help w/ vector task: Trapeze ABCD, AB parallel w/ CD, Vector AB=a, Vector AD=b, Vector DC=(2/3)a
Replies
8
Views
2K
Dr.Peterson
Dr.Peterson
A
identify this graph and transformation
Replies
0
Views
606
ardqua
A
C
Am I right about this rectangle? Cylinder is 4.5 wide, 10 high; gets wider but smaller as function of x
Replies
9
Views
1K
Cb3rs
C
P
Calculating surface area of triangle w/ coords (5/16 , 21/4),(3/8 , 8),(7/16 , 45/4), expressed as a fraction
Replies
2
Views
567
Perdurat
P
A
Problem with Sine Law: Find the length of the inner bisector of the corner at the top A.
Replies
3
Views
698
tkhunny
tkhunny
F
Similar shapes: Three solid shapes A, B, C are similar; surface area A is 4cm^2, of B is 25cm^2
Replies
2
Views
8K
freyatown
F
M
Suppose sin(x) - sin(y) = sqrt{7/3}, cos(x) + cos(y) = 1. Find cos(x + y).
Replies
3
Views
1K
MarkFL
MarkFL
F
Properties of kites: Given regular hexagon (as shown), find 2 distinct kites (can only find 1)
Replies
7
Views
1K
Faye
F
H
C = 90 degrees, values of sinA, sinB, sinC form geometric sequence. Find value of sinA
Replies
1
Views
1K
Dr.Peterson
Dr.Peterson
G
What measure of Angle A will make triangle ABC similar to triangle FDE?
Replies
2
Views
1K
Dr.Peterson
Dr.Peterson
D
Towns P, Q, R are such that bearing of P from Q is 070 degrees. R 10km east of Q, PQ = 5 km.
Replies
13
Views
4K
Denis
D
A
unit circle: if tanθ = -2/3 and θ is in quadrant II, what is the value of cosθ ?
Replies
4
Views
775
Alpha6
A
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