Explain all types of isomerism

 what is the format of article writing?

 what is the format of article writing?

urgent ..

formula for sin^-1X + sin^-1Y , sin^-1X -sin^-1Y

cos^-1X + cos^-1Y

cos^-1X - cos^-1Y

format of diary entry 

State the principal and working of a meter bridge?

summary of the last lesson

how to integrate

f (log(sin x ))dx

how to integrate

f (log(sin x ))dx

prove that :

tan [pi/4 + 1/2 cos^-1 a/b] + tan[pi/4 - 1/2cos^-1 a/b] = 2b/a