In the previous posts we covered the basic algebraic derivative rules (

click here to see previous post). But how can we derive trigonometric functions? Simply by memorizing some common trig derivatives:

(sin(x))’ = cos(x)

(cos(x))’=-sin(x)

(tan(x))’=sec²(x)

Let’s start with an example, (

click here):

Here’s another example (

click here):

Until next time,

Michal