Witryna2 wrz 2016 · =cosx + sinx/cosx xx sinx =cosx + sin^2x/cosx =(cos^2x + sin^2x)/cosx =1/cosx =secx Hopefully this helps! Witrynatanx=sinx:cosx=-3:4 sinx方+cosx方=1 连立方程组 就可以解得 sinx=-3/5,cosx=4/5 或sinx=3/5,cosx=-4/5 这类问题只要是靠 三角函数基本关系是来解决 即：sinx:cosx=tanx sinx方+cosx方=1 遇到求sinx或cosx的时候比较简单 结果往往只有一个（不必考虑正负） 遇到求tanx的时候就要难一些

tanx=sinx/cosx对不对_百度知道

WitrynaIn equation cosxsinx=sinx 2cosx we shouldn’t divide by cosx because we might lose solutions( cosx=0) . Correct. if we do we are essentially dividing by zero, how is this possible? How is what possible? You said it yourself: by dividing by cos(x), you are assuming cos(x) to be non-zero, and therefore ignoring the solution cos(x)=0. WitrynaFind the integral of y = f(x) = e^tanx*tanx/(cosx)² dx (e to the power of tangent of x multiply by tangent of x divide by (co sinus of e of x) squared) - with detailed solution [THERE'S THE ANSWER!] rediffusion turbo

x*tanx+ln(cosx)_Derivative function calculation …

Witryna19．已知cos=$\frac{4}{5}$.x∈(-$\frac{π}{2}$.-$\frac{π}{4}$).求$\frac{sin2x-2si{n}^{2}x}{1+tanx}$的值． WitrynaThe derivative of tan x with respect to x is denoted by d/dx (tan x) (or) (tan x)' and its value is equal to sec 2 x. Tan x is differentiable in its domain. To prove the … Witrynacosx is 1. At x = 0° and x = 360°, cosx = 1. cosx is −1. At x = 180°, cosx = −1. graph of cosx crosses the x-axis twice in the interval 0° ≤ x ≤ 360°. At x = 90° and x = 270°, … rediffusion the voice 2021