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What is Avogadro's Number and how it is related with atomic mass unit and how can we say that mass of one atom of carbon = 12/Na??? Please explain me with examples.
Updated Tue, 21 May 2019 02:20 pm

If the angle is measured in c.w.direction then why are the measurement of the angle is in negative and start with the IV quadrant ? Why are the rules of measurement of angles of a.c.w direction is not applicable for this ? Sir please explain by giving some examples. Sir please look at the figure given below and check the formula for tan(\(-\theta \)) and cot(\(-\theta \)) is right or not??
Updated Thu, 16 May 2019 10:04 am