Question: I have really no idea how to do this . I have come to $x = 3\pi (\sin^2(x/2))$ . How can I solve this? In such type of problems how can I take help of the graph(wolfram alpha equation solver used graph)? Will I have to plot $2x$ & then the R.H.S ? Plz teach me the technique so that I can easily use graph in such problems.

Answer: 
In the Danish educational system we are taught the order of operations in the following hierarchy:

1. Brackets
2. Roots and powers
3. Multiplication and division
4. Addition and subtraction

along with the rule of carrying out operations of equal order in the reading direction. In effect we have a **BO(D,M)(A,S)** system where **(D,M)** and **(A,S)** are pairs of equal order. This yields the same results for any calculation as all international standards prescribe, so no need to worry. The funny thing is that in our system you are meant to calculate as follows

$$
a\cdot b/c=(a\cdot b)/c
$$
whereas the English **BODM(A,S)** prescribes
$$
a\cdot b/c=a\cdot(b/c)
$$
Of course those two expressions are equal to one another, so it produces no controversies about Danish and international order of operation standards.

My best guess is that **BODMAS** was ordered that way in order to form a pronouncable word rather than the tongue twisting **BODMSA** knowing that A and S are equal as long as you apply the rule of the reading direction too.

**NOTE:** Actually **PEMDAS** would cause problems too unless we interpreted it as **PE(M,D)(A,S)**. For instance $a/b\cdot c$ would equal $a/(b\cdot c)$ if multiplication really came before division. But in reality what is meant is reading from the left to the right performing operations of equal order, namely $a/b\cdot c=(a/b)\cdot c$.
It must be BODMSA at all times. BODMAS is fake. Don't try to defend it and reject the impeccable BODMSA on the grounds of pronunciation. Can the 'nice' pronunciation right the wrong?  

Someone suggests we teach our students to consider, for example: 12-5+4 as 12+(-5)+4 without regarding the minus sign. I ask my fellow teacher, "what about 12-(-5)+4? Is the minus sign still insignificant?
In fact, we must admit to give priority to subtraction over addition in the order since it is correct at all times, whether it be at the left or the right. 
BODMAS says 12-9÷3+5=4; also 12-(-5)+4=13 while BODMSA gives correct answers of 14 and 21 respectively. 
It's true doing the operations from left to right is correct doesn't mean we should embrace what is not true.