### Differentiating Trigonometric Functions

When it comes to differentiating the functions of sin x and cos x, we need to use two fractions of the functions in question, when the variable approaches zero must be considered. They are as follows:

lim sin (x) / x, as x → 0

lim (cos x - 1) / x as x → 0

Based on the above, sin x and cos x can be differentiated as follows:

**y = sin x → dy/dx = cos x**

y = cos x → dy/dx = - sin x

y = tan x → dy/dx = sec² x

## Comments

## Post a Comment