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Geometry and Trigonometry

Points, Lines and Angles; Plane Shapes and Solids; Constructions; Congruences and Similarities; Analytic or Coordinate Geometry; Basic Vector Geometry
Ackbach
  • Sticky
Trigonometry Trigonometry to Memorize and Trigonometry to Derive
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1
Views
9K
Ackbach
Ackbach
S
Couple of hard trig questions...
Replies
1
Views
43
MarkFL
MarkFL
Amathproblem22
Addition of two sinusoids
Replies
3
Views
166
MarkFL
MarkFL
J
Line in second quadrant
Replies
3
Views
174
Joe_1234
J
J
Trapezoid
Replies
5
Views
102
MarkFL
MarkFL
O
Relationship between inner and outer radius of a two concentric circles
Replies
2
Views
89
MarkFL
MarkFL
C
Bearings-Finding the angle of B as well as the finding the bearing from point A to Point C.
Replies
3
Views
110
skeeter
skeeter
P
Find the points of intersection of a line and a circle
Replies
2
Views
202
kaliprasad
kaliprasad
mathmari
Trigonometry Acute angle of right triangles
Replies
4
Views
205
mathmari
mathmari
C
Trigonometry Using laws of sines and cosines to solve for a triangle
Replies
2
Views
126
MarkFL
MarkFL
A
Trigonometry Find the volume of the hexagonal-shaped plastic box
Replies
4
Views
194
Prove It
P
A
Find the intersection point for x = -5 + 8t, y = 1 + 10t, z = 9 + 8t ; -2x + 8y + 8z = 10
Replies
1
Views
463
Prove It
P
L
Trigonometry Solve trig equation cos(2x+20)=-cos(x-11)
Replies
5
Views
786
laprec
L
M
Math Cumulative Review: Find the equation of a Line
Replies
2
Views
788
HallsofIvy
H
masters
Find the scale factor of triangle ABC to triangle DEF
Replies
5
Views
611
masters
masters
karush
[SOLVED] 036 GRE Exam Integers Product of two integers is -48 but their sum is a positive number
Replies
2
Views
287
karush
karush
Monoxdifly
[ASK] Geometry and Series
Replies
2
Views
223
HallsofIvy
H
Monoxdifly
[ASK] Area of a Triangle
Replies
3
Views
164
Klaas van Aarsen
Klaas van Aarsen
karush
030 GRE Geometry similiar triangles
Replies
2
Views
280
HallsofIvy
H
K
Finding 2D Polygon Coordinates from a point
Replies
2
Views
228
Krotus
K
T
The smallest circle that two parts of a semi-circle can fit into?
Replies
1
Views
292
LCKurtz
LCKurtz
Dhamnekar Winod
Maximum area of rectangle which circumscribes the given quadrilateral.
Replies
21
Views
1K
Klaas van Aarsen
Klaas van Aarsen
J
Trigonometry Amplitude, Period, frequency and phase angle
Replies
1
Views
689
skeeter
skeeter
Monoxdifly
[ASK] Equation of a Circle in the First Quadrant
Replies
4
Views
390
Monoxdifly
Monoxdifly
T
Find the missing coordinates
Replies
1
Views
183
skeeter
skeeter
Monoxdifly
[ASK] A Circle Which Touches the X-Axis at 1 Point
Replies
2
Views
212
Monoxdifly
Monoxdifly
Monoxdifly
Trigonometry [ASK] Proving Trigonometry 2sinα+2sinβ+2sinγ=4sinαsinβsinγ
Replies
4
Views
1K
Greg
Greg
T
Need help finding Diagonals of a Rhombus
Replies
2
Views
419
Opalg
Opalg
N
How many marbles are in a jar?
Replies
1
Views
317
Nick C
N
Monoxdifly
Trigonometry [ASK} Prove (cos2x+cos2y)/(sin2x−sin2y)=1/tan(x−y)
Replies
2
Views
580
Monoxdifly
Monoxdifly
G
Surface of Angular Land
Replies
6
Views
641
ghostfirefox
G
G
Calculate the length of the fourth side edge.
Replies
3
Views
397
skeeter
skeeter
Monoxdifly
[ASK] About Triangle where A as the right angle and BD is the bisector of angle B
Replies
2
Views
329
Monoxdifly
Monoxdifly
G
Points in a square, surface
Replies
1
Views
205
skeeter
skeeter
T
Golden section and yin-yang symbol proportions
Replies
2
Views
306
tongtu
T
G
Analytic geometry proof with triangle.
Replies
3
Views
477
ghostfirefox
G
karush
[SOLVED] GRE Circles exam question: Find the shaded area as a fraction
Replies
8
Views
635
karush
karush
N
height/diameter relationship of 19 (H8/D8=19)
Replies
2
Views
480
nelg
N
E
problem solving calculating area
Replies
7
Views
553
Monoxdifly
Monoxdifly
A
Check if two points are symmetrics/asymmetric
Replies
2
Views
527
LCKurtz
LCKurtz
G
Find slant height of a cone
Replies
2
Views
863
HallsofIvy
H
Monoxdifly
[ASK] Equation of a Circle
Replies
4
Views
675
Monoxdifly
Monoxdifly
P
Geostationary Orbit
Replies
3
Views
435
HallsofIvy
H
S
Trigonometry solving trig equation cos(x)=sin(x) + 1/√3
Replies
3
Views
2K
kaliprasad
kaliprasad
B
Find the angle of the parable tangent derived from the theoretical arc traced by a foot
Replies
1
Views
582
MarkFL
MarkFL
karush
[SOLVED] 236 GRE exam Three circles with centers on the same line segment PQ
Replies
2
Views
471
karush
karush
B
Trigonometry Trigonometry: Right-angled triangle
Replies
1
Views
783
skeeter
skeeter
Monoxdifly
[ASK] Find the volume of Pyramid in a Cube
Replies
6
Views
875
Monoxdifly
Monoxdifly
L
Year 10 Maths Find the length and width that will maximize the area of rectangle
Replies
2
Views
431
Greg
Greg
Z
Trigonometry Largest Quadrilateral inscribed in Scalene Triangle
Replies
0
Views
329
Zane
Z
S
Trigonometry Real world trigonometry problem making furniture
Replies
1
Views
464
skeeter
skeeter
P
Trigonometry Angle of elevation: Which expression represents the eagle's height above the ground? (answer involves tan)
Replies
2
Views
490
HallsofIvy
H
M
Prove AC//BD and AF//BE
Replies
1
Views
715
Opalg
Opalg
G
Smallest possible area of triangle
Replies
3
Views
596
HallsofIvy
H
Monoxdifly
[ASK] Find the ratio of the area of triangle BCH and triangle EHD
Replies
4
Views
653
Monoxdifly
Monoxdifly
G
Solve for the angles in a triangle
Replies
4
Views
579
gazparkin
G
Y
Tangent line of a Circle
Replies
5
Views
1K
Olinguito
Olinguito
N
Given nets draw the figure
Replies
3
Views
514
skeeter
skeeter
G
Trigonometry Find angles in triangle
Replies
2
Views
658
gazparkin
G
S
finding dot product
Replies
4
Views
2K
HallsofIvy
H
Z
The height of a section of overlapping circles.
Replies
3
Views
582
Greg
Greg
Z
Find the exact shaded area of the region in 4 overlapping circles
Replies
1
Views
542
Olinguito
Olinguito
J
Planes Question
Replies
1
Views
499
Klaas van Aarsen
Klaas van Aarsen
D
Trigonometry Angular Velocity
Replies
4
Views
3K
didaw
D
Y
Trigonometry Trigonometric Question sin^2(180-x) cosec(270+x) + cos^2(360-x) sec(180-x)
Replies
1
Views
500
skeeter
skeeter
G
Trigonometry prove identity (sinx+cosx)/(secx+cscx)= sinxcosx
Replies
1
Views
472
MarkFL
MarkFL
karush
Trigonometry km8,38 Find the value of \theta if it exists
Replies
4
Views
520
karush
karush
karush
Trigonometry 33. Express sin 4x in terms of sin x and cos x
Replies
1
Views
513
skeeter
skeeter
W
Circles in a square and diameter of the circle
Replies
3
Views
843
Olinguito
Olinguito
T
Trigonometry Finding Chord length given arc length and arc height?
Replies
0
Views
456
tomadom
T
C
Singapore Ferris wheel with 30 minutes of revolution time
Replies
1
Views
1K
skeeter
skeeter
K
Trigonometry Making a formula that finds the horizontal and vertical distance between two points that change with
Replies
1
Views
1K
skeeter
skeeter
F
Find area of a triangle in coordinate plane
Replies
4
Views
773
Country Boy
C
I
Trigonometry How to divide a circumference into equal parts, WITHOUT COMPASS?
Replies
1
Views
764
Wilmer
W
karush
Trigonometry Prove (tan^2 t−1)/(sec^2 t)=(tan t−cot t)/(tan t+cot t)
Replies
3
Views
626
topsquark
topsquark
W
Trigonometry cos(sin^(−1) x) = √(1−x^2)
Replies
4
Views
872
Olinguito
Olinguito
W
Trigonometry Prove q((p^2)-1) = 2
Replies
1
Views
562
kaliprasad
kaliprasad
Monoxdifly
[ASK] How to Read A'?
Replies
4
Views
1K
Opalg
Opalg
S
Trigonometry Area of a triangle.
Replies
2
Views
821
MarkFL
MarkFL
S
Trigonometry Parallelogram with diagonals. Need to find the area (S).
Replies
5
Views
680
Wilmer
W
karush
Trigonometry chord length
Replies
7
Views
805
Olinguito
Olinguito
G
Trigonometry Tangent line to circle making 30º with a second circle
Replies
2
Views
518
GONURVIA
G
T
Simple Transformations
Replies
2
Views
1K
skeeter
skeeter
M
Trigonometry finding the impedance in rectangular and polar form
Replies
11
Views
1K
DavidCampen
D
karush
Trigonometry prove trig identity (cot x -1)/(cot x +1)=(1-sin 2x)/(cos 2x)
Replies
3
Views
499
topsquark
topsquark
M
Trigonometry (e^ix)-1=(2ie^(ix/2))x(sin (x/2))
Replies
1
Views
777
Country Boy
C
C
Trigonometry Trigonometric riddle
Replies
0
Views
429
chileflora
C
U
Trigonometry Right Isosceles triangle: solve for the length of the unknown legs
Replies
2
Views
533
Country Boy
C
U
Trigonometry Two pulleys
Replies
1
Views
412
Evgeny.Makarov
E
V
Trigonometry expression sin^n(x)/(sin^n(x)+cos^n(x))
Replies
2
Views
568
Vali
V
M
Interested math problem
Replies
1
Views
1K
Country Boy
C
Y
Trigonometry sum of the measures of the interior angles of a heptagon
Replies
1
Views
471
skeeter
skeeter
Y
Congruency prove AH=DK
Replies
1
Views
1K
Greg
Greg
H
pi
Replies
3
Views
1K
Klaas van Aarsen
Klaas van Aarsen
D
Trigonometry Finding the width of the gorge
Replies
4
Views
1K
MarkFL
MarkFL
R
change bisector from one triangle to another
Replies
1
Views
1K
skeeter
skeeter
J
Simpsons formula and the volume of a pyramid frustum
Replies
4
Views
812
MarkFL
MarkFL
E
Find the area of the shaded region in terms of pi.
Replies
3
Views
730
MarkFL
MarkFL
E
Find the areas of segment in circle
Replies
1
Views
463
MarkFL
MarkFL
E
Find the area of sector in a circle in terms of pi. (Geometry)
Replies
3
Views
660
Country Boy
C
E
Find the height and base of a trapezium
Replies
1
Views
823
Country Boy
C
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