Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
F
prove a trigonometric equation: If √2cosA = cosB + cos³B and √2sinA = sinB - sin³B, then...
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2
Views
1K
khansaheb
K
M
How - 22 turn into 121....and in line seven how i get 226?
Replies
9
Views
2K
Dr.Peterson
Dr.Peterson
shahar
Sum of angles in circle (five-cornered star inscribed in circle; chords have equal lengths)
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9
Views
2K
khansaheb
K
C
Inclined Plane vector problem ("A 100kg TV is loaded onto a truck using a ramp at a 30-deg angle.")
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5
Views
1K
Dr.Peterson
Dr.Peterson
G
A cone and cylinder are joined to make a solid. (The cone is on top of the cylinder.)
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2
Views
1K
Dr.Peterson
Dr.Peterson
C
Vector addition, trying to find the angle (resulting velocity of plane with respect to ground)
Replies
7
Views
2K
Harry_the_cat
Harry_the_cat
C
Finding magnitude (length) and direction (angle) of a vector
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4
Views
1K
pka
pka
K
Similar triangles?? proportions
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3
Views
1K
Steven G
Steven G
C
Manipulating Trig Functions in terms of "a" and "b"
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5
Views
1K
khansaheb
K
J
What is x?
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2
Views
885
lev888
lev888
C
Connected Pully question
Replies
6
Views
1K
Steven G
Steven G
G
Coordinates: "Straight line P has equation y= 3x+ 7 Straight line Q is parallel to P and intersects the y-axis at 2...."
Replies
3
Views
1K
pka
pka
T
Finding formula for the area of a segment with radius r, central angle theta
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2
Views
1K
tpupble
T
L
Find the radius of a circle, given its diameter
Replies
7
Views
2K
topsquark
topsquark
Qwertyuiop[]
How to evaluate values of sinx cosx tanx for very large values of x?
Replies
6
Views
1K
khansaheb
K
Y
Figure 1 is formed by a rectangular box measuring 38cm by 15cm and 2 identical white balls...
Replies
13
Views
2K
ronnieyoe225
R
Z
Arguments: "Write the truth value for the following biconditional statement..."
Replies
2
Views
1K
Zelda22
Z
R
Pythagorean Theorem; 3 of the smallest Pythagorean Triples; SSS, SAS, and AA similarities; etc
Replies
4
Views
981
Dr.Peterson
Dr.Peterson
A
Stuck on this (Find the value of x from drawing of angles inside a circle)
Replies
16
Views
2K
Dr.Peterson
Dr.Peterson
T
Finding the equation of a plane ("A golf ball is hit from a tee towards a hole...")
Replies
5
Views
1K
blamocur
blamocur
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