Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
B
Given that 2sin2x + cos2x = a, show that (1 + a)tan^2x-4tanx+a=1
Replies
5
Views
2K
Cubist
Cubist
I
Negative square
Replies
16
Views
2K
In2infinity
I
S
Hi im having trouble understanding in what to do here i hope someone can help me :)
Replies
8
Views
1K
The Highlander
The Highlander
L
Angle curve and line
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13
Views
2K
Steven G
Steven G
E
Getting roots from polynomials or minimum and maximum points for a trig function. Has anyone seen this question, what textbook?
Replies
5
Views
879
elizahami0
E
C
Angle calculation
Replies
2
Views
834
The Highlander
The Highlander
D
Physics - Force and Interactions
Replies
11
Views
7K
skeeter
skeeter
A
Circumradius of a quadrangle
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12
Views
1K
austral
A
L
Triangle similarity
Replies
2
Views
865
Loki123
L
A
Radius of circumscribed circle of triangle
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2
Views
929
austral
A
N
Trying to find a way to prove that two angles are equal
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8
Views
2K
lex
L
L
Circular ring
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11
Views
2K
Loki123
L
S
Finding turning points in a curve.
Replies
1
Views
642
Dr.Peterson
Dr.Peterson
H
Express F as a vector in terms of the unit vectors i and j
Replies
6
Views
3K
The Highlander
The Highlander
G
Line equations
Replies
2
Views
833
LCKurtz
LCKurtz
W
Diagonal matrix formula
Replies
18
Views
2K
Steven G
Steven G
A
A simple problem?
Replies
6
Views
1K
Andrey02
A
B
Need help with trigonometry problem
Replies
4
Views
883
Dr.Peterson
Dr.Peterson
J
The best way to do Geometry
Replies
2
Views
854
mmm4444bot
mmm4444bot
J
Geometry Problem involving vectors
Replies
1
Views
655
pka
pka
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