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Course: Precalculus > Unit 2. Lesson 3: Inverse trigonometric functions. Intro to arcsine. Intro to arctangent. Intro to arccosine. Evaluate inverse trig functions. Restricting domains of functions to make them invertible. Domain & range of inverse tangent function. Using inverse trig functions with a calculator.
Learn about the slope and direction of a line with Khan Academy's free educational video.
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Math: Pre-K - 8th grade; Pre-K through grade 2 (Khan Kids) Early math review; 2nd grade; 3rd grade; 4th grade; 5th grade; 6th grade; 7th grade; 8th grade; Illustrative math 3rd grade
Sin is the ratio of the opposite side to the hypotenuse, cos is the ratio of the adjacent side to the hypotenuse, and tan is the ratio of the opposite side to the adjacent side. They are often written as sin (x), cos (x), and tan (x), where x is an angle in radians or degrees. Created by Sal Khan.
一个人可以认为 0/0为 0， 因为 0 除以任何数都为 0 。另一个人可以认为 0/0 为 1，因为任何数除以它自己都为1。然而这就是问题所在！每当我们说起 0/0 的结果时，我们都会使这个或那个实数的性质互相矛盾。
Course Updates for Pre-Algebra in July 2021. We are excited to share that we've made significant enhancements to our Pre-Algebra. One consequence of adding this new content is that it may impact learners’ Mastery percentages. When we add new content and remove old content, Mastery percentages often change because the number of available ...
Discover the magic of the imaginary unit 'i'! This lesson dives into simplifying the square root of negative numbers using 'i', the principal square root of -1. We'll explore how to rewrite negative numbers as products, and use prime factorization to simplify roots.