现有用户?据一种href="//www.parkandroid.com/account/login/?next=/practice/2d-coordinate-geometry-level-3-challenges/" id="problem-login-link-alternative" class="btn-link ax-click" data-ax-id="clicked_login_from_generic_modal" data-ax-type="button" data-is_modal="true" data-next="/practice/2d-coordinate-geometry-level-3-challenges/">登录据/a>
现有用户?据一种href="//www.parkandroid.com/account/login/?next=/practice/2d-coordinate-geometry-level-3-challenges/" id="problem-login-link-alternative" class="btn-link ax-click" data-ax-id="clicked_login_from_problem_modal" data-ax-type="button" data-is_modal="true" data-next="/practice/2d-coordinate-geometry-level-3-challenges/">登录据/a>
圆圈据span class="katex">
O.据/span>以点的原点为中心据span class="katex">
P.据/span>=据/span>(据/span>3.据/span>那据/span>4.据/span>)据/span>躺在它上面。红线据span class="katex">
L.据/span>:据/span>3.据/span>X据/span>+据/span>4.据/span>y据/span>-据/span>7.据/span>=据/span>0.据/span>在点处与圆圈相交据span class="katex">
一种据/span>和据span class="katex">
B.据/span>那据/span>如图所示。据/p>
什么是四边形地区据span class="katex">
一种据/span>O.据/span>B.据/span>P.据/span>还是据/span>
您确定要查看解决方案吗?据/p>
⎩据/span>⎪据/span>⎨据/span>⎪据/span>⎧据/span>一种据/span>N据/span>+据/span>1据/span>=据/span>α.据/span>一种据/span>N据/span>+据/span>(据/span>1据/span>-据/span>α.据/span>)据/span>B.据/span>N据/span>B.据/span>N据/span>+据/span>1据/span>=据/span>α.据/span>B.据/span>N据/span>+据/span>(据/span>1据/span>-据/span>α.据/span>)据/span>C据/span>N据/span>C据/span>N据/span>+据/span>1据/span>=据/span>α.据/span>C据/span>N据/span>+据/span>(据/span>1据/span>-据/span>α.据/span>)据/span>一种据/span>N据/span>
让据span class="katex">
一种据/span>1据/span>那据/span>B.据/span>1据/span>那据/span>C据/span>1据/span>在坐标平面上是三个不同的非共线点。据B.r>还据span class="katex">
一种据/span>N据/span>那据/span>B.据/span>N据/span>那据/span>C据/span>N据/span>满足上面的复发关系(据span class="katex">
0.据/span>据据/span>α.据/span>据据/span>1据/span>)。据/p>
然后据span class="katex">
N据/span>→据/span>∞据/span>林据/span>一种据/span>N据/span>是个据span class="katex">
__________据/span>三角形据span class="katex">
一种据/span>1据/span>B.据/span>1据/span>C据/span>1据/span>。据/p>
您确定要查看解决方案吗?据/p>
您是否知道我们可以有坐标系,其中坐标轴不是彼此垂直的?这种坐标系是已知的据em>倾斜坐标系据/em>。据/p>
上图显示了倾斜坐标系。在这种系统中,据span class="katex">
X据/span>通过测量从点到到的距离来找到一个点据span class="katex">
y据/span>- XIS平行于据span class="katex">
X据/span>-轴。同样,据span class="katex">
y据/span>通过测量从点到到的距离来找到一个点据span class="katex">
X据/span>- XIS平行于据span class="katex">
y据/span>-轴。上图中的红点具有坐标据span class="katex">
(据/span>一种据/span>那据/span>B.据/span>)据/span>。据/p>
题:据/strong>我们有两点:据span class="katex">
一种据/span>(据/span>1据/span>那据/span>6.据/span>)据/span>和据span class="katex">
B.据/span>(据/span>5.据/span>那据/span>2据/span>)据/span>在倾斜坐标系中,正轴之间的角度是据span class="katex">
6.据/span>0.据/span>∘据/span>。两点之间的距离是多少,据span class="katex">
一种据/span>B.据/span>还是据/p>
您确定要查看解决方案吗?据/p>
这据span class="katex">
△据/span>一种据/span>O.据/span>B.据/span>包括点据span class="katex">
一种据/span>=据/span>(据/span>0.据/span>那据/span>1据/span>)据/span>, 观点据span class="katex">
O.据/span>=据/span>(据/span>0.据/span>那据/span>0.据/span>)据/span>和点据span class="katex">
B.据/span>躺在某处据span class="katex">
X据/span>-轴。据/p>
让据span class="katex">
P.据/span>是第一个象限中的点,这样据span class="katex">
一种据/span>P.据/span>=据/span>P.据/span>B.据/span>和据span class="katex">
一种据/span>O.据/span>∥据/span>P.据/span>B.据/span>,如上所示。据/p>
如果长度据span class="katex">
O.据/span>P.据/span>是据span class="katex">
1据/span>9.据/span>4.据/span>
,四边形的面积是多少?据span class="katex">
一种据/span>O.据/span>B.据/span>P.据/span>还是据/span>
您确定要查看解决方案吗?据/p>
粒子在这一点上据span class="katex">
(据/span>3.据/span>那据/span>5.据/span>)据/span>在飞机上。它在积极方向上10个单位据span class="katex">
X据/span>-轴。然后它朝向正确的角度呈现90度,其初始方向并前进5个单位,现在它再次右转,前进2.5个单位。它一直保持右转,并在它之前转到距离的一半距离。这毫无结束了。从原点找到粒子的最终距离据span class="katex">
(据/span>0.据/span>那据/span>0.据/span>)据/span>还是据/p>
答案将以形式的平方根进来据span class="katex">
X据/span>,提交您的答案据span class="katex">
X据/span>。据/p>
您确定要查看解决方案吗?据/p>
问题加载......据/p>
注意加载......据/p>
设置加载......据/p>