Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
A
If sin θ = (-3/5) and pi < θ < 3pi/2, then what is tan θ?
Replies
4
Views
2K
stapel
stapel
E
Solving 3D: graphing 0=sin x cos y + sin y cos z + sin z + cos x
Replies
7
Views
4K
stapel
stapel
D
design project: split 15cm wide x 30cm high x 1cm deep acrylic arch into 15 pieces...
Replies
3
Views
1K
stapel
stapel
L
How can i solve 4sin(x)cos(x) + cos(x) = 2
Replies
6
Views
2K
Lez
L
N
Problem involving a tetrahedron
Replies
1
Views
909
NiGHTS
N
M
GRE Quant part Geometry (25 exercises)
Replies
9
Views
3K
Steven G
Steven G
N
Can you help solve this please
Replies
1
Views
945
Deleted member 4993
D
N
Help with area measurements exponent
Replies
2
Views
1K
NewAge500
N
B
Trig identities: 4sinA+5cosB=5 and 5sinB+4cosA=6
Replies
7
Views
3K
Deleted member 4993
D
B
Show that .... is independent of theta
Replies
7
Views
3K
Deleted member 4993
D
M
arranging series of fencing panels into irregular Polygon/circle
Replies
4
Views
2K
tkhunny
tkhunny
D
inverted sine shows up as error.
Replies
4
Views
2K
mmm4444bot
mmm4444bot
M
general formula for great circles on equidistant cylindrical map
Replies
0
Views
892
meems
M
A
Find Radius, given values of X, Y (I know it involves chord length)
Replies
8
Views
2K
Bob Brown MSEE
B
M
Drawing a circle: y = x^2 + y^2 + 3x + 36 + 4
Replies
10
Views
2K
mmm4444bot
mmm4444bot
M
De moivre's theorem & binomial theorem: If x+1/x= 2cosa, prove that x^6-2x^3cos3a+1=0
Replies
8
Views
3K
stapel
stapel
E
Optimization of lengths in space
Replies
2
Views
1K
stapel
stapel
D
Sports Math Class: find the number of baseballs in the trailer
Replies
2
Views
3K
stapel
stapel
A
geometry proof: ...Prove that triangle ADO is equilateral.
Replies
3
Views
2K
mmm4444bot
mmm4444bot
A
Find Angle with three (x, y) coordinate points
Replies
3
Views
2K
Mrspi
M
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