Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
T
Solving trig equation sin(2x) - cos(2x) = 0
Replies
3
Views
10K
tkhunny
tkhunny
B
Need help with defintion of 'equiangular triangle'
Replies
2
Views
1K
stapel
stapel
I
needing help with proofs, but unclear on their purpose
Replies
2
Views
1K
stapel
stapel
E
I need help with doing proofs. Suggestions?
Replies
1
Views
1K
stapel
stapel
J
help w/ truth value of disjuntion 'q or not-p'
Replies
1
Views
1K
pka
pka
B
Find the vertex of 0.4y^2 – 36y + 1000
Replies
6
Views
19K
tkhunny
tkhunny
S
Verify tanx^2 = ((1 - cos2x) / (1 + cos2x) using dbl. angle
Replies
3
Views
16K
soroban
S
J
need help w/ reason for m<BPC + 2(m<PBC) = 180
Replies
1
Views
1K
stapel
stapel
S
Find exact values for sine, cosine, and tangent of 19pi/12
Replies
2
Views
31K
smsmith
S
J
How the Zero Product Property is Used?
Replies
2
Views
2K
soroban
S
S
help! how do you do proofs!
Replies
1
Views
1K
pka
pka
T
How is cos(90 - [degrees]) equivalent to sin([degrees])?
Replies
4
Views
5K
skeeter
skeeter
J
Formalizing Proofs: m<PBC= m<PCB; m<PAB= m<PBA
Replies
2
Views
2K
JayJay06
J
K
Construct an isosceles triangle with the given sides.
Replies
3
Views
2K
Denis
D
P
Geometry Problem: A band is streched around the equator.
Replies
1
Views
1K
stapel
stapel
K
What is the converse, inverse, and contrapositive ?
Replies
3
Views
2K
stapel
stapel
T
help with solving sin4x = -2sin2x [0, 2pi)
Replies
2
Views
4K
galactus
G
S
Hexagon Inscribed in a Circle. Help?
Replies
5
Views
2K
Denis
D
K
proving trig identities: 1 + sinx = (sin 1/2 x + cos 1/2 x)2
Replies
1
Views
6K
royhaas
R
G
Trigonometric Identities
Replies
3
Views
2K
soroban
S
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