Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
C
If 0<a,b<π and cos(a) + cos(b) - cos(a+b) = 3/2 then show that a=b=π/3
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1
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3K
pka
pka
P
please help with these problems, thanks in advance!!
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1
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2K
ksdhart2
K
D
Sine wave Phase Separation/Reconstruction
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1
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2K
Ishuda
I
B
Sum and Product Formulae: calculate max. value of power in the circuit if...
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2
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2K
Barry1234
B
C
The 3-parameter transformation found from the measurements are: ΔX = 337.285 ΔY = -21
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0
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1K
chessguru
C
C
Write z_1 = -sqrt2i, z_2 = -3-3sqrt3i in polar form. Find product, quotients.
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3
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3K
Prove It
P
W
Proof that sin(A)=sin(A+B2)cos(A−B2)+cos(A+B2)sin(A−B2)
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1
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1K
Ishuda
I
T
Simple Trig Question- Need an explanation as to why two of these options work
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1
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971
stapel
stapel
M
Surface Area Sheet
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1
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889
stapel
stapel
S
Triangle and figure: In triangle ABC, what is the length of side BC?
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5
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4K
stapel
stapel
M
Calculating and visualizing the mean distance between 3 points in 3D
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5
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2K
Ishuda
I
K
right triangle ABC w/ AB = 4x, BC = 12, AD = (2/3)AC. Find...
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1
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994
stapel
stapel
G
Trig Identities Help
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1
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899
Deleted member 4993
D
K
Rhombus inscribed in a rectangle
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1
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1K
Ishuda
I
S
triangle prism with sides of 4.75 meters and 2.5 meters and a height of 1.5 meters.
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1
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1K
stapel
stapel
C
Particle path geometry
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1
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2K
charliedmp
C
J
Proving the 'boundary' of a function is equal to cosec(x).
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1
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1K
ksdhart2
K
C
Trigonometric form of [2/3(cos(π/2)+isin(π/2))][3(cos(2π/3)+isin(2π/3))]
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4
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3K
pka
pka
J
working out the area of shaded area.
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2
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1K
stapel
stapel
D
Trig equations: solving csc(5x) = sin(7x) over the interval [0, 2pi]
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4
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2K
stapel
stapel
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