# How do you simplify #f(theta)=tan(theta/2)-4sec(theta/4)+sin(theta/4)# to trigonometric functions of a unit #theta#?

##### 1 Answer

Answer is in the explanation.

#### Explanation:

It is my rule that, on par with

In other words, for Australians, the Earth spins clockwise and, for

Mexicans, it is anticlockwise.

So, both can keep the spin

with respect to the advancing real time. And so,

if

if

For any

Choose the prefix sign

when

Example:

wherein