Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
L
please tell me if i did my trig work right.
Replies
2
Views
1K
galactus
G
B
cos x sin y = 1/2 sin(sin(x + y) – sin (x - y))?
Replies
4
Views
8K
baselramjet
B
N
Find the vertices of the ellipse x^2/36 + y^2/12 = 1
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4
Views
2K
Mrspi
M
G
Trigonometric equation: solving sin 2theta = cos 7pi/4
Replies
3
Views
3K
Guest
G
B
Product Identity: sin^2 t - tan^2 t = - (sin^2t)(tan^2t)
Replies
11
Views
3K
stapel
stapel
G
Show that {Trigonometric identities}
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1
Views
1K
arthur ohlsten
A
G
Right triangles (the tangent ratio)
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2
Views
3K
soroban
S
N
Find the directrix of a parabola
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1
Views
1K
soroban
S
L
if angle a is an acute angle, and sin a = .9540 find tan A??
Replies
1
Views
2K
skeeter
skeeter
L
its a right triangle and the smallest angle is 20 degrees...
Replies
1
Views
2K
stapel
stapel
L
right triangle, and one degree is obviously 90, and other is
Replies
2
Views
1K
stapel
stapel
D
range of cos theta, sin theta, and tan theta
Replies
6
Views
7K
arthur ohlsten
A
A
Given: DC bisects AB and AC is congruent to BC; Prove:....
Replies
1
Views
2K
stapel
stapel
S
ellipse x^2 + 2y^2 -6x+4y+7=0: find vertices, foci, graph
Replies
5
Views
6K
galactus
G
T
angle complements, supplements; reference angles; etc
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2
Views
2K
stapel
stapel
T
A pilot has just started on the glide path for landing...
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2
Views
12K
TVigz42
T
S
[MOVED] Find eqn of parabola through (-2,3), (0,3), (1,9)
Replies
5
Views
2K
summergrl
S
J
find eqn of tangent fcn with given period, vertical shift,
Replies
1
Views
2K
skeeter
skeeter
L
Looking for formulas for areas of trapezoids, parallelograms
Replies
1
Views
1K
jwpaine
J
N
[MOVED] domains of sine, cosine, and tangent
Replies
2
Views
2K
jwpaine
J
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