According to me the sequence is a combination of 4 sequences triggered by four input numbers,in this case these four no.'s are ---4,8,9,10.
these sequnces follow there own rules unaffected by others.
All have only one thing in common that there first two numbers show anamolous behaviour...
There is a unique sequence of positive numbers that starts with the number 1 at the
first position and has the following properties.
• Each value in the sequence is greater than or equal to every value that appears
earlier in the sequence.
• If the value at position k in the sequence is m...
Your two problems can be solved easily-------------Akash
Sin(a-b)Sin(a+b)
=Sin(a^2) -Sin(b^2) /////////////////////you can check this easily. it is a formula
=[1-cos(2a)-{1-Cos2b)]/2
=[1-cos(2a)-1+cos(2b)]/2
=[cos(2a)-cos(2b)]/2 ////////////////expressed in double angle in...