Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
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Exercise with angle bisector: find x1, x2 explicitly as function of L, D and alpha
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3
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2K
mmm4444bot
mmm4444bot
R
Trig Question Dealing with Sum, Difference, Double Angle, and Half Angle Formulas
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2
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1K
rojareina
R
L
Precalc: Solve 2sinx^(2 ) - 5cosx - 4 = 0, 2cosx^(2) = 3sinx + 3
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2
Views
1K
Dr.Peterson
Dr.Peterson
K
Parallel lines and congruent segments question
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4
Views
2K
stapel
stapel
C
Christmas tree cone covered with Baci chocolates - How many chocolates?
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2
Views
1K
stapel
stapel
R
Proving trig identities: cos(g+h)cos(g-h) = cos^2(g)-cos^2(h)
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3
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2K
mmm4444bot
mmm4444bot
D
Triangulation Question: bearing, elevation angles from 2 observers
Replies
7
Views
4K
DoingMathMe
D
M
[Linear Algebra] Matrix "proof" type problem involving determinants ( I think)
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1
Views
1K
barrick
B
B
Trig Identity Simplification of (cot(x)+tan(x))/tan(x)sec(x)
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1
Views
953
tkhunny
tkhunny
B
Help! Stuck on this 3D trigonometry question (area of tiled roof)
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1
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2K
tkhunny
tkhunny
D
So is the trig calculator wrong or did I mess up or did the teacher just mark incorre
Replies
1
Views
1K
tkhunny
tkhunny
O
Basic Bisector Problem That Makes Me Crazy
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5
Views
1K
Ozanemreist
O
I
if e gets in power of (tetta*i) makes a rotating circle in complex plan
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2
Views
2K
im alex
I
B
Trig Cosine Word Problem (temperature of a chemical reaction oscillates between...)
Replies
1
Views
1K
mmm4444bot
mmm4444bot
C
Coordinates of D: A(-2,2), B(4,4) and C(5,2) are the vertices of a triangle...
Replies
4
Views
3K
mmm4444bot
mmm4444bot
F
Rewrite csc(θ-45°) as an equivalent value using its cofunction.
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1
Views
1K
ksdhart2
K
M
Calc Area of an Irregular Decagon
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3
Views
1K
tkhunny
tkhunny
O
triangle and trapezoid problem
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1
Views
848
tkhunny
tkhunny
S
General formula for multiplying a matrix by a power
Replies
9
Views
2K
sktsasus
S
S
Sin Cos Tan??
Replies
4
Views
3K
frank789
F
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