正割是三角函数的一种。在定义域为(0, π/2) 时是在直角三角形某个锐角的斜边与邻边的比，用sec表示。 正割是余弦的倒数，即secθ=1/cosθ，正割的函数图像为偶函数，且为周期函数.

In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for which both sides of the equality are defined. Geometrically, these are identities involving certain functions of one or more angles.

1、secx是正割：正割指的是直角三角形，斜边与某个锐角的邻边的比，叫做该锐角的正割，用 sec（角）表示。 如下图所示：一个锐角∠A的正割 正割是余弦函数比值表达式互.

引个路，咱们首先画y=secx，不妨拿起笔和纸，尝试一下 注意最开始可以找图像上的几个点（结合sec和cos互为倒数），然后像线绳串珠子一样，画出大致的图像

Use the form asec(bx−c)+ d a sec (b x - c) + d to find the variables used to find the amplitude, period, phase shift, and vertical shift. Since the graph of the function sec s e c does not have a maximum or minimum value, there can be no value for the amplitude. Find the period of sec(x) sec (x). Tap for more steps...

\sec x = \frac{1}{\cos{x}} \csc{x} = \frac{1}{\sin{x}} \cot{x} = \frac{1}{\tan{x}} 平方关系 \sin^{2}x + \cos^{2}x = 1. 1 + \tan^{2} x = \sec^{2}x. 1 + \cot^{2}x = \csc^{2}x. 商关系 \tan{x} = \frac{\sin{x}}{\cos{x}} = \frac{\sec{x}}{\csc{x}} \cot{x} = \frac{\cos{x}}{\sin{x}} = \frac{\csc{x}}{\sec{x}} 三角恒等变换公式 和差公式

在y=secx中，以x的任一使secx有意义的值与它对应的y值作为(x，y)．在直角坐标系中作出的图形叫正割函数的图像，也叫正割曲线。 y=secx是偶函数，即sec(－x)=secx．图像对称于y轴；y=secx是周期函数．周期为2kπ(k∈Z，且k≠0)，最小正周期T=2π正割与 余弦 互为倒数，余 ...

When `cos x` is very small, `sec x` will be very large. After applying this concept throughout the range of x-values, we can proceed to sketch the graph of `y = sec x`. First, we graph `y = cos x` and then `y = sec x` immediately below it. Compare the y-values in each of the 2 graphs and assure yourself they are the reciprocal of each other. y ...

2021年3月9日 · 正割（Secant，sec）是三角 函数 的一种。 它的定义域不是整个实数集，值域是绝对值大于等于一的实数。 在y=secx中，以x的任一使secx有意义的值与它对应的y值作为 (x，y)．在直角坐标系中作出的图形叫正割函数的图像，也叫正割曲线。 cscx是余割，定义斜边比对边也就是正弦的倒数。 cscx=1/sinxy=cscx. 直角三角形某个锐角的斜边与对边的比，叫做该锐角的余割，用 csc（角）表示 。 一个角的斜边比上对边,这个角的顶点与平面直角坐标系的原点 …

Rewrite the equation as sec(x) = y sec (x) = y. Take the inverse secant of both sides of the equation to extract x x from inside the secant. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.