3.(Mathematics) a sixth part of a circle having an arc which subtends an angle of 60° [C17: from Latinsextānsone sixth of a unit] Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 201...
nounThe quarter of a circle; the arc of a circle containing 90°; also, the figure included between this arc and two radii drawn from the center to each extremity; the division of angular magnitude from zero to a right angle, or 90°. ...
From 1570s as "the quarter of a circle, the arc of a circle containing 90 degrees." The ancient surveying instrument for measuring altitudes is so called from c. 1400, because it forms a quarter circle. Related:Quadrantal. also fromlate 14c. ...
百度试题 结果1 题目Identify the quadrant that θ lies in as OP moves around the unit circle and hence state whether the trigonometric function of θ is positive or negative.θ =-100^(° ), tan θ 相关知识点: 试题来源: 解析 3rd, positive ...
Find the adjacent side of the unit circletriangle. Since the hypotenuse and opposite sides are known, use the Pythagorean theorem to find the remaining side.( (Adjacent)=√(((hypotenuse))^2-((opposite))^2))Replace the known values in the equation.( (Adjacent)=√(((4))^2-((1)...
Unit Circle: A circle centered at the origin with radius 1. The unit circle can be used to define the trigonometric functions at any angle, not just acute angles. In particular, cosθ and sinθ are defined as the x-coordinate and y-coordinate, respectively, of the point on the...
A unit circle is a circle of radius 1. If P(x,y) is a point on the unit circle, then x2+y2=1. If we know one coordinate of the point P, then we can find the other coordinate by substituting it in the above formula. Then we get a ± sign for the answer. We...
In which Quadrant is -570 degrees?Negative Angles in a Unit Circle:In trigonometry, when moving along the unit circle, positive angles are measured counter-clockwise and negative angles are measured clockwise from the origin. A similar convention is used for angles in polar coordinates....
Example 1: Half Angle Sine Evaluate: {eq}sin\:15^{\circ} {/eq} 15° is not a commonly known angle, and it doesn't usually appear on the unit circle. But 15 is half of 30, which is a common angle on the unit circle. Use the half-angle identity for sine. ...
Find thehypotenuseof theunit circletriangle. Since the opposite and adjacent sides are known, use thePythagorean theoremto find the remaining side. Hypotenuse=√opposite2+adjacent2Hypotenuse=opposite2+adjacent2 Replace the known values in theequation. ...