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en.wikipedia.org/wiki/Rotation_matrix

In linear algebra, a rotation matrix is a matrix that is used to perform a rotation in Euclidean ... Since matrix multiplication has no effect on the zero vector (the coordinates of .... so that it does not matter in which order multiple rotations are performed. .... its angle — the amount of rotation about that axis (Euler rotation theorem).

www.answers.com/Q/How_many_degrees_are_in_a_null_angle

Zero. A null angle is formed by two straight linesthat coincide. ... How many degrees do supplementary angles have? It is 180 degrees I think. I was looking for ...

www.answers.com/Q/A_null_angle_contains_how_many_degrees

Null angles is a term used in mathematics to describe the conceptbetween 2 different tangent directions at a ... How many degrees does a right angle contain?

www.mathopenref.com/angle.html

Definition of an angle. ... If we want to talk about the size, or measure, of the angle in degrees, we should say ... However, many times we will see '∠ABC=34°'. ... angles have some extra properties: They can have a measure greater than 360°,  ...

www.harmonycentral.com/articles/what-you-need-to-know-about-microphone-polar-patterns

Nov 25, 2014 ... If you have a SM58 or similar cardioid microphone, you can try it ... Many microphones have a single, "fixed" pattern, while some ... Because they pick up sound arriving from all angles equally well, they ... Bi-directional microphones have the best rejection at the null points of any polar pattern - you can get ...

www.mathsisfun.com/geometry/straight-angle.html

A straight angle is 180 degrees ... A straight angle changes the direction to point the opposite way. Sometimes people say "You did a complete 180 on that!

www.reddit.com/r/NoStupidQuestions/comments/5m5q7j/how_many_degrees_does_a_sphere_have

A degree is a 2d measurement that doesn't really apply to spheres. For a sphere you have ... With a sphere you will need two angles. One that ...

math.stackexchange.com/questions/3679/what-is-the-direction-of-a-zero-null-vector

Aug 31, 2010 ... The zero vector has no particular direction; this is consistent with the fact ... In particular, Rn∖0 does not have the same homotopy as Rn -- i.e., ...

www.phys.hawaii.edu/~anita/new/papers/militaryHandbook/antennas.pdf

5. Antenna with a 20 degree beamwidth has a 20 dB gain. 6. 3 dB beamwidth is approximately equal to the angle from the peak of the power to the first null (see ...