![Ex: Simplify Tan(pi/2 – u) Using Sine and Cosine Difference Identity | Math Help from Arithmetic through Calculus and beyond Ex: Simplify Tan(pi/2 – u) Using Sine and Cosine Difference Identity | Math Help from Arithmetic through Calculus and beyond](http://img.youtube.com/vi/kJnN5jwK96k/0.jpg)
Ex: Simplify Tan(pi/2 – u) Using Sine and Cosine Difference Identity | Math Help from Arithmetic through Calculus and beyond
tan((pi/2)sin θ) = cos((pi/2)cos θ) then sin θ + cos θ = ? (1) 0 (2) 1 (3) –1 (4) 1 or –1 - Sarthaks eConnect | Largest Online Education Community
![trigonometry - Since $\tan(25\pi/2)$ is undefined, and $\cot x = \frac{1}{\ tan x}$, then why isn't $\cot(25\pi/2)$ undefined instead of $0$? - Mathematics Stack Exchange trigonometry - Since $\tan(25\pi/2)$ is undefined, and $\cot x = \frac{1}{\ tan x}$, then why isn't $\cot(25\pi/2)$ undefined instead of $0$? - Mathematics Stack Exchange](https://i.stack.imgur.com/PLJhQ.gif)