Question:

Answer:


Step-by-step explanation:
Given

Required
Simplify
In trigonometry:

So, the expression becomes:

Simplify the denominator




Express the fraction as:





Rationalize



In trigonometry:

Hence:


For multiplication, if both integers have like signs, it is always positive. If they have unlike signs it is negative.
For division, if both integers have like signs it is positive. If they have unlike signs it is negative.
There are 2² butterflies.
Or simply 2²