Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
O
Calculating Linear Feet of Wood Needed to Form Circle
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2
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1K
Onlinebear
O
R
Find angles and area of this trapezoid: 4 side lengths, 1 angle measure known
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5
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2K
Richacinas
R
V
Trigonometry: If asin x=bcos x=ctan 2x and (a2-b2)2=kc2(a2+b2) then k=?
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4
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1K
HallsofIvy
H
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Square Roots of Integers Expressed with Sines (for sqrt(7) or higher primes)
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0
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616
kinerd518
K
C
How to graph rational trigonometric function y = cosx/x+(pi/2) when x is negative
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1
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970
Dr.Peterson
Dr.Peterson
R
Difficulty Solving a Question on Volumes: concrete cube 10m x 10m x 10m & elephant
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3
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1K
tkhunny
tkhunny
M
Trig. equation: solve 〖cos〗^2 x = 1.5 ×〖sin 〗^2 x on 1st period
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1
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1K
Deleted member 4993
D
K
lateral surface area of pentagonal prism; base-edge lengths, height of right prism;
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3
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4K
stapel
stapel
D
Finding Equation of plane: (x-1)/-3 = (y-3)/2 = (z+2)/1, w/ point (0,7,-7)
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5
Views
1K
HallsofIvy
H
1
Polar Coordinates: Writing x^2+y^2+5x=0, x^2(x^2+y^2)=7y^2 as Values of R
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6
Views
3K
13whispers
1
T
triangle and trapeze problem pls help
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2
Views
1K
Dr.Peterson
Dr.Peterson
L
Show, among 9 pts in rectangle [-1,1]x[0,1], there are 2 pts w/ dist. <1/sqrt[2]
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4
Views
1K
Dr.Peterson
Dr.Peterson
C
Trajectory problem: Given a 3-dimensional rectangular solid sitting on the earth...
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1
Views
843
Deleted member 4993
D
T
Need help w/ trigonometry problem: x pos., acute, cos(x)= a, then tan(x)=...?
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3
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1K
TheGreatBuBBy
T
M
Can someone help with the below please: circle inscribed in square w/ area 196cm^2
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4
Views
2K
Steven G
Steven G
M
Angles of Elevation: 173 metres from the base of the Eiffel Tower
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2
Views
2K
HallsofIvy
H
M
Perimeter Q: A right-angled triangle has its two perpendicular sides in the ratio 5:1
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1
Views
941
Deleted member 4993
D
S
Trigonometric Equations: Solve sin 3x - sin x = cos x, cos 2x + 3 sin x = 2
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2
Views
954
stapel
stapel
M
Find values on x axis above function: x(t)=(cosπt)(sin20πt)
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12
Views
4K
Steven G
Steven G
G
How ratios are written here? (Circle center O, r=7, m(BOC)=120; |BC|=?)
Replies
16
Views
3K
sinx
S
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