3tan10°+1 (4cos210°-2)sin10°=___. 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 原式= 3sin10°+cos10° 2cos20°sin10°cos10°= 2sin(10°+30°) 2cos20°sin10°cos10°= 2sin40° sin20°cos20°= 4sin40° sin40°=4.故答案为:4. 解析看不懂?免费...
If we want to approximate the value of cos20° with a polynomial, what minimum degree must be the polynomial so that the error is less than 10−3 ? https://socratic.org/questions/if-we-want-to-approximate-the-value-of-cos-20-with-a-polynomial-what-minimum-deg 0 Explanation: This que...
2.1.1659 Part 1 Section 22.1.2.27, degHide (Hide Degree) 2.1.1660 Part 1 Section 22.1.2.28, den (Denominator) 2.1.1661 Part 1 Section 22.1.2.30, dispDef (Use Display Math Defaults) 2.1.1662 Part 1 Section 22.1.2.32, e (Element (Argument)) 2.1.1663 Part 1 Section 22.1.2....
-child(7) { --_d: 90deg; } .clock time:nth-child(8) { --_d: 120deg; } .clock time:nth-child(9) { --_d: 150deg; } .clock time:nth-child(10) { --_d: 180deg; } .clock time:nth-child(11) { --_d: 210deg; } .clock time:nth-child(12) { --_d: 240deg; }...
我们把按逆时针方向旋转所形成的角叫做正角，把按顺时针方向旋转所形成的角叫做负角，以OA为始边的角α=210°，β=-150°，γ=660°，特别地，当一条射线没有作任何旋转时，我们也认为这时形成了一个角，并把这个角叫做零角，记法：角或可以简记成。⑶意义：用“旋转”定义角之后，角的范围大...
.clocktime:nth-child(11) {--_d:210deg; } .clocktime:nth-child(12) {--_d:240deg; } 通过以上代码,我们为时钟的每个数字设置了相应的角度值。这些角度值按照每次递增 30 度来完成整个圆的布局。 好的,现在是时候动手使用sin()和cos()函数了!我们想要使用它们来获取每个数字的 X 和 Y 坐标,以便将...
Use saved searches to filter your results more quickly Cancel Create saved search Sign in Sign up Reseting focus {{ message }} wmdsg / MUYIio.github.io Public forked from MUYIio/MUYIio.github.io Notifications You must be signed in to change notification settings ...
它是周期函数，其最小正周期为2π。在自变量为2kπ（k为整数）时，该函数有极大值1；在自变量为（2k+1）π时，该函数有极小值-1。余弦函数是偶函数，其图像关于y轴对称。三角函数的定义1. 设是一个任意角，在的终边上任取（异于原点的）一点P（x，y）则P与原点的距离。2. 突出探究的几个...
v_(b)=180cos(377t-120\\\deg )V\\nv_(c)=180cos(377t-240\\\deg )V\\nv_(a)=180sin377tV \\nb.\\nv_(b)=180sin(377t+120\\\deg )V\\nv_(c)=180sin(377t-120\\\deg )V\\nv_(a)=-400sin377tV \\nc.\\nv_(b)=400sin(377t+210\\\deg )V\\nv_(c)=400...
\cos(-150°) Find the exact value of the trigonometric function. cos (\frac{5\pi}{4}) Find the exact value of following trigonometric function: tan ({-5 pi}/2). Find the exact value of the trigonometric function csc(3 pi/2). Find the exact value of following trigonometric...