sec x =\frac{cos x}{2\left(1+ sen x\right)}+\frac{cos x}{2\left(1- sen x\right)}

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Integral de sen x entre 1 + cos x , completando derivada, forma dv/v

https://www.youtube.com/watch?v=xJvnQ3sAr-g

Pre-Calculus - Solving a trigonometric equation with our angle divided by 4, 2sin(x/4)+sqrt(3) =0

https://www.youtube.com/watch?v=CijimYb5MTM

Pre-Calculus - How to simplify a trigonometric expression by squaring a binomial (sin(x)+cos(x))^2

https://www.youtube.com/watch?v=e5IczuZxvVI

Simplifying basic trig identities - Math homework answers sec(x) (sin(x)/tan(x))

https://www.youtube.com/watch?v=JEv8uSt26bI

Tutorial - Solving a rational Equation ex2, 1/x + x/2 = (x+4)/ 2x

https://www.youtube.com/watch?v=a49VWDDgsMk

How do we find the period of our trigonometric graphs sine and cosine

https://www.youtube.com/watch?v=yZLeN_9jjGg

Main Topic: Simplify Trigonometric Expressions

Simplification of trigonometric expressions consists of rewriting an expression with trigonometric functions in a simpler form. To perform this task, we usually use the most common trigonometric identities, and some algebra.

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