Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
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[Precalc] Trig Identities and Equations
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2
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prefix
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Triangle GHI is a right triangle; GH=5, HI= x+4, GI= 2x-3
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1
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2K
arthur ohlsten
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Find area of reg. pentagon w/ s = 7 and apothem of 4.8
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4
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2K
JayJay06
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please tell me if i did my trig work right.
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2
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galactus
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B
cos x sin y = 1/2 sin(sin(x + y) – sin (x - y))?
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4
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8K
baselramjet
B
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Find the vertices of the ellipse x^2/36 + y^2/12 = 1
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4
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2K
Mrspi
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Trigonometric equation: solving sin 2theta = cos 7pi/4
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3
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3K
Guest
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B
Product Identity: sin^2 t - tan^2 t = - (sin^2t)(tan^2t)
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11
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4K
stapel
stapel
G
Show that {Trigonometric identities}
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1
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1K
arthur ohlsten
A
G
Right triangles (the tangent ratio)
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2
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3K
soroban
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Find the directrix of a parabola
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1
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1K
soroban
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if angle a is an acute angle, and sin a = .9540 find tan A??
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1
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2K
skeeter
skeeter
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its a right triangle and the smallest angle is 20 degrees...
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1
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2K
stapel
stapel
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right triangle, and one degree is obviously 90, and other is
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2
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1K
stapel
stapel
D
range of cos theta, sin theta, and tan theta
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6
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7K
arthur ohlsten
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A
Given: DC bisects AB and AC is congruent to BC; Prove:....
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1
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2K
stapel
stapel
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ellipse x^2 + 2y^2 -6x+4y+7=0: find vertices, foci, graph
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5
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6K
galactus
G
T
angle complements, supplements; reference angles; etc
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2
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2K
stapel
stapel
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A pilot has just started on the glide path for landing...
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2
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12K
TVigz42
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[MOVED] Find eqn of parabola through (-2,3), (0,3), (1,9)
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5
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2K
summergrl
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